TTM Technologies, Inc.

1665 Scenic Avenue, Suite 250

Costa Mesa, California 92626

Ladies and Gentlemen:

We have acted as counsel to TTM Technologies, Inc., a Delaware corporation (the “Company”), in connection with the offering of an aggregate of $220,000,000 principal amount of the Company’s 1.75% Convertible Senior Notes due 2020 (the “Notes”), initially convertible into 22,827,486 shares of the Company’s common stock, par value $.001 per share (the “Conversion Shares”), pursuant to the Registration Statement on Form S-3 (File No. 333-191986), filed with the Securities and Exchange Commission (the “Commission”) under the Securities Act of 1933, as amended (the “Act”), and declared effective by the Commission on November 8, 2013 (the “Registration Statement”), including the prospectus included in the Registration Statement (the “Base Prospectus”), and the prospectus supplement relating to the Notes filed with the Commission pursuant to Rule 424(b) promulgated under the Act (together with the Base Prospectus, the “Prospectus”).

The Notes are to be issued and sold by the Company pursuant to (i) the Underwriting Agreement, dated as of December 16, 2013 (the “Underwriting Agreement”), among the Company and the several Underwriters named in Schedule I to the Underwriting Agreement for whom J.P. Morgan Securities LLC and RBS Securities Inc. are acting as Representatives, and (ii) an Indenture dated December 20, 2013 (the “Indenture”), between the Company and American Stock Transfer & Trust Company, LLC, as trustee (the “Trustee”).

With respect to the opinions set forth below, we have examined originals, certified copies, or copies otherwise identified to our satisfaction as being true copies, of the Registration Statement, the Underwriting Agreement, the Indenture, and such other corporate records of the Company, agreements and other instruments, and certificates of public officials and officers of the Company as we have deemed necessary as a basis for the opinions hereinafter expressed. As to various questions of fact material to such opinions, we have, where relevant facts were not independently established, relied upon statements of officers of the Company. For purposes of the opinions set forth below, we have assumed (i) that the documents and signatures examined by us are genuine and authentic; (ii) the persons executing the documents examined by us have the legal capacity to execute such documents; (iii) the payment of the full consideration due to the Company for the Notes; (iv) that the Indenture has been duly authorized, executed, and delivered by the Trustee; and (v) that the Notes have been duly issued, executed, and authenticated by the Trustee. For purposes of

Greenberg Traurig, LLP • Attorneys at Law • WWW.GTLAW.COM

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