EXHIBIT 10.5

Exhibit 10.5

FORM OF LOCK-UP AGREEMENT

THIS LOCK-UP AGREEMENT (this “Agreement”) is made and entered into as of [●], 2026, by and between (i) OpenPayd Global Holdings Limited, a Cayman Islands exempted company (“Pubco”), and (ii) the undersigned (the “Holder”). Pubco and the Holder are sometimes referred to herein individually as a “Party” and, collectively, as the “Parties”. Any capitalized term used but not defined in this Agreement will have the meaning ascribed to such term in the Business Combination Agreement (as defined below).

WHEREAS, Titan Acquisition Corp, Pubco and OpenPayd Holdings Limited, among others, entered into a business combination agreement, dated [●], 2026 (the “Business Combination Agreement”), pursuant to which the parties thereto shall consummate a series of transactions, including the exchange of all of the Company Shares owned by the Holder into a corresponding number of Pubco Ordinary Shares determined in accordance with the Business Combination Agreement.

WHEREAS, pursuant to the Business Combination Agreement, and in view of the valuable consideration to be received by the Holder thereunder, Pubco and the Holder desire to enter into this Agreement, pursuant to which the Pubco Ordinary Shares to be received by the Holder pursuant to the Business Combination Agreement (together with any securities paid as dividends or distributions with respect to such securities or into which such securities are exchanged or converted, the “Restricted Securities”) shall become subject to limitations on disposition as set forth herein.

NOW, THEREFORE, in consideration of the premises set forth above, which are incorporated in this Agreement as if fully set forth below, and intending to be legally bound hereby, the Parties hereby agree as follows:

(a) The Holder agrees that it shall not effectuate a Transfer (as defined below) of the Restricted Securities that are held by the Holder during the period commencing from the Share Acquisition Closing until six months after the Share Acquisition Closing (the “Lock-Up Period”). Notwithstanding the foregoing, a total of 15% of the Restricted Securities shall be released from the lock-up restrictions on a staggered basis prior to the expiration of the Lock-Up Period, with three percent of the Restricted Securities to be released every 30 days following the Share Acquisition Closing.

(b) Notwithstanding the provisions set forth in Section 1(a), Transfers of the Restricted Securities that are held by the Holder (and that have complied with this Section 1(b)) are permitted (i) to Pubco’s officers or directors, any Affiliates or immediate family members of any of Pubco’s officers or directors, any members of the Holder, or any Affiliates of the Holder, (ii) to shareholders or limited partners of the Holder, or, in the case of a Holder which is a limited liability partnership, its members, (iii) by gift to a member of the Holder’s immediate family or to a trust, the beneficiary of which is a member of the Holder’s immediate family, an Affiliate of such person or to a charitable organization, (iv) by virtue of the laws of descent and distribution upon death, (v) pursuant to a qualified domestic relations order or in connection with a divorce settlement, (vi) to (A) any department of His Majesty’s Government (the “UK Government”), including their executive agencies, other subsidiary bodies and other parts of UK Government; (B) companies wholly or partly owned by UK Government departments and their subsidiaries; (C) non-departmental public bodies, other public bodies, public corporations and their subsidiary bodies sponsored by UK Government departments; and/or (D) any successors to any of the entities set out in clauses (A), (B) and (C) above or any new bodies which fall within the same criteria (vii) by virtue of the laws of the Holder’s jurisdiction of incorporation or organization, the Holder’s Organizational Documents or the rights attaching to the equity interests in the Holder upon dissolution of the Holder, (viii) pursuant to the exercise of any options,

warrants or other convertible securities to purchase Pubco Ordinary Shares (which exercises may be effected on a cashless basis to the extent the instruments representing such options or warrants permit exercises on a cashless basis); provided, that any Pubco Ordinary Shares issued upon such exercise shall be subject to the Lock-Up Period, (ix) to satisfy tax withholding obligations pursuant to the Holder’s equity incentive plans or arrangements, (x) in connection with any bona fide mortgage, pledge or encumbrance to a financial institution in connection with any bona fide loan or debt transaction or enforcement thereunder, including foreclosure thereof, (xi) by a Holder to any entity including without limitation any fund, partnership, company or investment trust to whom the Holder transfers interests in one or more of its portfolio of investments, or any successor entity following a restructuring transaction of that Holder, and (xii) in connection with a transfer pursuant to (1) a bona fide third party tender offer, merger, amalgamation, arrangement, consolidation or other similar transaction made to all Holders of Pubco Ordinary Shares involving a change of control of Pubco, (2) a sale of all or substantially all of the assets of Pubco, or (3) any other transaction or series of related transactions as a result of which the holders of Pubco Ordinary Shares immediately prior to such transaction cease to own at least a majority of the outstanding Pubco Ordinary Shares of Pubco or its successor entity, provided, that in clauses (i) through (xi), the transferee must enter into a written agreement in substantially the form of this Agreement, agreeing to be bound by the terms of the Lock-up Period. If dividends in respect of Restricted Securities are declared and payable in Pubco Ordinary Shares, such dividends will also be subject to the Lock-up Period.

(c) If any Transfer is made or attempted contrary to the provisions of this Agreement, such Transfer shall be null and void ab initio, and Pubco shall refuse to recognize any such transferee of the Restricted Securities as one of its equity holders for any purpose. In order to enforce this Section 1, Pubco may impose stop-transfer instructions with respect to the Restricted Securities of the Holder (and any permitted transferees and assigns thereof) until the end of the Lock-Up Period.

(d) During the Lock-Up Period, each certificate evidencing any Restricted Securities (if any are issued) shall be stamped or otherwise imprinted with a legend in substantially the following form, in addition to any other applicable legends:

“THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO RESTRICTIONS ON TRANSFER SET FORTH IN A LOCK-UP AGREEMENT, DATED AS OF [●], 2026, BY AND BETWEEN THE ISSUER OF SUCH SECURITIES (THE “ISSUER”) AND THE ISSUER’S SECURITY HOLDER NAMED THEREIN, AS AMENDED. A COPY OF SUCH LOCK-UP AGREEMENT WILL BE FURNISHED WITHOUT CHARGE BY THE ISSUER TO THE HOLDER HEREOF UPON WRITTEN REQUEST.”

(e) For the avoidance of any doubt, the Holder shall retain all of its rights as a shareholder of Pubco with respect to the Restricted Securities during the Lock-Up Period, including the right to vote any Restricted Securities.

(f) For the avoidance of any doubt “Restricted Securities” shall not include any Pubco Ordinary Shares acquired (i) in the public market after the Share Acquisition Closing Date, (ii) in a private placement concurrently with the consummation of the Merger and (iii) pursuant to a transaction exempt from registration under the Securities Act.

(g) To the extent that Pubco determines, in its reasonable discretion, that additional public float is required to satisfy the initial or continued listing requirements of the Nasdaq or any other national securities exchange on which the Restricted Securities are then listed or quoted, the Holder may be released from the lock-up restrictions set forth in this Section 1 with respect to such number of Restricted Securities as Pubco shall determine is necessary to satisfy such listing requirements.

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(h) For the purposes of this Section 1, “Transfer” shall mean the (i) sale of, offer to sell, contract or agreement to sell (including, for the avoidance of doubt, through a distribution in specie), hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or establishment or increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Exchange Act, and the rules and regulations of the SEC promulgated thereunder with respect to, any security, (ii) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any security, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) public announcement of any intention to effect any transaction specified in clause (i) or (ii).

(a) Binding Effect; Assignment. This Agreement and all of the provisions hereof shall be binding upon and inure solely to the benefit of the Parties and their respective permitted successors and assigns. Except as otherwise provided in this Agreement, this Agreement and all obligations of the Parties are personal to the Parties and may not be transferred or delegated by the Parties at any time.

(b) Third Parties. Nothing contained in this Agreement or in any instrument or document executed by any Party in connection with the transactions contemplated hereby shall create any rights in, or be deemed to have been executed for the benefit of, any Person that is not a Party hereto or thereto or a successor or permitted assign of such a Party.

(c) Governing Law; Submission to Jurisdiction. This Agreement and any non-contractual rights or obligations arising out of or in connection with it shall be governed by and construed in accordance with the Laws of the State of New York, without giving effect to the principles of conflicts of Laws that would otherwise require the application of Law of any other State. THE PARTIES HEREBY IRREVOCABLY SUBMIT TO THE EXCLUSIVE JURISDICTION OF THE STATE AND FEDERAL COURTS SITTING IN THE STATE OF NEW YORK SOLELY IN RESPECT OF THE INTERPRETATION AND ENFORCEMENT OF THE PROVISIONS OF THIS AGREEMENT AND THE TRANSACTIONS CONTEMPLATED HEREBY, AND HEREBY WAIVE, AND AGREE NOT TO ASSERT, AS A DEFENSE IN ANY ACTION, SUIT OR PROCEEDING FOR INTERPRETATION OR ENFORCEMENT HEREOF OR THAT SUCH ACTION, SUIT OR PROCEEDING MAY NOT BE BROUGHT OR IS NOT MAINTAINABLE IN SAID COURTS OR THAT VENUE THEREOF MAY NOT BE APPROPRIATE OR THAT THIS AGREEMENT MAY NOT BE ENFORCED IN OR BY SUCH COURTS, AND THE PARTIES HERETO IRREVOCABLY AGREE THAT ALL CLAIMS WITH RESPECT TO SUCH ACTION, SUIT OR PROCEEDING SHALL BE HEARD AND DETERMINED BY SUCH A NEW YORK STATE OR FEDERAL COURT. THE PARTIES HEREBY CONSENT TO AND GRANT ANY SUCH COURT JURISDICTION OVER THE PERSON OF SUCH PARTIES AND OVER THE SUBJECT MATTER OF SUCH DISPUTE AND AGREE THAT MAILING OF PROCESS OR OTHER PAPERS IN CONNECTION WITH SUCH ACTION, SUIT OR PROCEEDING IN THE MANNER PROVIDED IN SECTION 13.1 OF THE BUSINESS COMBINATION AGREEMENT OR IN SUCH OTHER MANNER AS MAY BE PERMITTED BY LAW SHALL BE VALID AND SUFFICIENT SERVICE THEREOF. EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY DISPUTE WHICH MAY ARISE UNDER THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY. EACH PARTY CERTIFIES AND

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ACKNOWLEDGES THAT (A) NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER; (B) SUCH PARTY UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THE FOREGOING WAIVER; (C) SUCH PARTY MAKES THE FOREGOING WAIVER VOLUNTARILY; AND (D) SUCH PARTY HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVER AND CERTIFICATIONS IN THIS SECTION 2(c). For purposes of this Section 2(c), “Dispute” means any dispute, controversy, claim or difference of whatever nature arising out of, relating to, or having any connection with this Agreement, including a dispute regarding the existence, formation, validity, interpretation, performance or termination of this Agreement or the consequences of its nullity and also including any dispute relating to any non-contractual rights or obligations arising out of, relating to, or having any connection with this Agreement.

(d) Interpretation. The titles and subtitles used in this Agreement are for convenience only and are not to be considered in construing or interpreting this Agreement. In this Agreement, unless the context otherwise requires: (i) references to the singular shall include the plural and vice versa and references to one gender include any other gender; (ii) references to a “Person” includes any individual, partnership, body corporate, corporation sole or aggregate, state or agency of a state, and any unincorporated association or organization, in each case whether or not having separate legal personality; (iii) reference to any Person includes such Person’s successors and assigns but, if applicable, only if such successors and assigns are permitted by this Agreement, and reference to a Person in a particular capacity excludes such Person in any other capacity; (iv) general words shall not be given a restrictive meaning because they are followed by words which are particular examples of the acts, matters or things covered by the general words and the words “includes” and “including” shall be construed without limitation; (v) the words “herein,” “hereto,” and “hereby” and other words of similar import in this Agreement shall be deemed in each case to refer to this Agreement as a whole and not to any particular Section or other subdivision of this Agreement; (vi) the word “if” and other words of similar import when used herein shall be deemed in each case to be followed by the phrase “and only if”; (vii) the term “or” means “and/or”; (viii) the word “day” means calendar day unless Business Day is expressly specified; and (ix) references to “Dollars” or “$” are references to the lawful currency from time to time of the United States of America. The Parties have participated jointly in the negotiation and drafting of this Agreement. Consequently, in the event an ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the Parties, and no presumption or burden of proof shall arise favoring or disfavoring any Party by virtue of the authorship of any provision of this Agreement.

(e) Notices. All notices, consents, waivers and other communications hereunder shall be in writing and shall be given (and shall be deemed to have been duly given upon receipt) by delivery (i) in person, (ii) by e-mail (having obtained electronic delivery confirmation thereof), (iii) by reputable, internationally recognized overnight courier service or (iv) by registered or certified mail, pre-paid and return receipt requested, provided, however, that notice given pursuant to clauses (iii) and (iv) above shall not be effective unless a duplicate copy of such notice is also given in person or by e-mail (having obtained electronic delivery confirmation thereof); in each case to the applicable Party at the following addresses (or at such other address for a Party as shall be specified by like notice):

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(f) Amendments and Waivers. This Agreement may be amended, supplemented or modified only by execution of a written instrument signed by Pubco and the Holder. Subject to the following sentence, Pubco and the Holder may seek to (i) extend the time for the performance of any obligation or other act of the other Party hereto, (ii) waive any inaccuracy in the representations and warranties by the other Party contained herein or in any document delivered pursuant hereto and (iii) waive compliance by the other Party with any covenant or condition contained herein. Any such extension or waiver shall be valid only if set forth in an instrument in writing signed by the Party or Parties to be bound thereby. Notwithstanding the foregoing, no failure or delay by a Party in exercising any right or remedy hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further exercise of any other right hereunder.

(g) Severability. In case any provision in this Agreement shall be held invalid, illegal or unenforceable in a jurisdiction, such provision shall be modified or deleted, as to the jurisdiction involved, only to the extent necessary to render the same valid, legal and enforceable, and the validity, legality and enforceability of the remaining provisions hereof shall not in any way be affected or impaired thereby nor shall the validity, legality or enforceability of such provision be affected thereby in any other jurisdiction. Upon such determination that any term or other provision is invalid, illegal or incapable of being enforced, the Parties will substitute for any invalid, illegal or unenforceable provision a suitable and equitable provision that carries out, so far as may be valid, legal and enforceable, the intent and purpose of such invalid, illegal or unenforceable provision.

(h) Specific Performance. Each Party acknowledges that the rights of each Party to consummate the transactions contemplated hereby are unique, recognizes and affirms that in the event of a breach of this Agreement by any Party, money damages may be inadequate and the non-breaching Party may have no adequate remedy at law, and agrees that irreparable damage may occur in the event that any of the provisions of this Agreement were not performed by an applicable Party in accordance with their specific terms or were otherwise breached. Accordingly, each Party shall be entitled to seek an injunction, specific performance or other equitable remedy to prevent or remedy any breach of this Agreement and to seek to enforce specifically the terms and provisions hereof, in each case, without the requirement to post any bond or other security or to prove that money damages would be inadequate, this being in addition to any other right or remedy to which such Party may be entitled under this Agreement, at law or in equity.

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  (i) Entire Agreement. This Agreement sets out the entire agreement between the Parties in respect of the subject matter contained herein and therein and, save to the extent expressly set out in this Agreement or the other Ancillary Documents, supersede and extinguish any prior drafts, agreements, undertakings, representations, warranties, promises, assurances and arrangements of any nature whatsoever, whether or not in writing, relating thereto. Each Party confirms that it has not entered into this Agreement on the basis of any representation, warranty, undertaking or other statement whatsoever by another Party which is not expressly incorporated into this Agreement and that, to the extent permitted by law, a Party shall have no right or remedy in relation to action taken in connection with this Agreement other than pursuant to this Agreement; provided, that, for the avoidance of doubt, the foregoing shall not affect the rights and obligations of the Parties under the Business Combination Agreement or any other Ancillary Document. Notwithstanding the foregoing, nothing in this Agreement shall limit any of the rights, remedies or obligations of the Parties under any other agreement between the Holder and Pubco or any certificate or instrument executed by the Holder in favor of Pubco, and nothing in any other agreement, certificate or instrument shall limit any of the rights, remedies or obligations of the Parties under this Agreement.

(j) Further Assurances. From time to time, at another Party’s request and without further consideration (but at the requesting Party’s reasonable cost and expense), each Party shall execute and deliver such additional documents and take all such further action as may be reasonably necessary to consummate the transactions contemplated by this Agreement.

(k) Counterparts. This Agreement may be executed and delivered (including by facsimile, email or other electronic transmission) in one or more counterparts, and by the different Parties in separate counterparts, each of which when executed shall be deemed to be an original but all of which taken together shall constitute one and the same agreement.

[Remainder of Page Intentionally Left Blank; Signature Pages Follow]

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IN WITNESS WHEREOF, the Parties have executed this Agreement as of the date first written above.

Signature Page to Lock-Up Agreement

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IN WITNESS WHEREOF, the Parties have executed this Agreement as of the date first written above.

Signature Page to Lock-Up Agreement

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