Re: Registration Statement on Form S-4 Ladies and Gentlemen: As legal counsel to TTM Technologies, Inc., a Delaware corporation (the “Company”), we have assisted in the preparation of the Company’s Registration Statement on Form S-4 filed by the Company with the Securities and Exchange Commission on or about November 5, 2014 (as further amended or supplemented, the “Registration Statement”), in connection with the registration under the Securities Act of 1933, as amended (the “Securities Act”), of 15,472,216 shares of common stock of the Company covered by the Registration Statement (the “Shares”). The Registration Statement relates to the issuance of the Shares in accordance with an Agreement and Plan of Merger, dated September 21, 2014, by and among the Company, Viasystems Group, Inc. (“Viasystems”), and Vector Acquisition Corp. (the “Merger Agreement”). With respect to the opinion set forth below, we have examined originals, certified copies, or copies otherwise identified to our satisfaction as being true copies, only of the following: A. The Certificate of Incorporation of the Company, as filed with the Secretary of State of the State of Delaware (the “Delaware Secretary of State”) on June 21, 2005, as amended by the Certificate of Amendment of Certificate of Incorporation of the Company, as filed with the Delaware Secretary of State on June 3, 2011, as currently in effect; B. The Fourth Amended and Restated Bylaws of the Company, as currently in effect; C. Resolutions adopted by the Board of Directors of the Company on September 21, 2014; D. The Merger Agreement; and E. The Registration Statement. We have assumed that (i) the documents and any signatures on such documents examined by us are genuine and authentic; (ii) the persons executing the documents examined by us have the legal capacity to execute such documents; and (iii) the Shares will be issued upon the terms and conditions set forth in the Merger Agreement. GREENBERG TRAURIG, LLP ¡ ATTORNEYS AT LAW ¡ WWW.GTLAW.COM 2375 East Camelback Road, Suite 700 ¡ Phoenix, Arizona 85016 ¡ Tel 602.445.8000 ¡ Fax 602.445.8100 | | | | ALBANY AMSTERDAM ATLANTA AUSTIN BOCA RATON BOSTON CHICAGO DALLAS DELAWARE DENVER FORT LAUDERDALE HOUSTON LAS VEGAS LONDON* LOS ANGELES MEXICO CITY+ MIAMI MILAN** NEW JERSEY NEW YORK NORTHERN VIRGINIA ORANGE COUNTY ORLANDO PHILADELPHIA PHOENIX ROME** SACRAMENTO SAN FRANCISCO SEOUL¥ SHANGHAI SILICON VALLEY TALLAHASSEE TAMPA TEL AVIV^ WARSAW~ WASHINGTON D.C. WESTCHESTER COUNTY WEST PALM BEACH * OPERATES AS GREENBERG TRAURIG MAHER LLP + OPERATES AS GREENBERG TRAURIG, S.C. ** STRATEGIC ALLIANCE ¥ OPERATES AS GREENBERG TRAURIG LLP FOREIGN LEGAL CONSULTANT OFFICE ^ A BRANCH OF GREENBERG TRAURIG, P.A., FLORIDA, USA ~ OPERATES AS GREENBERG TRAURIG GRZESIAK SP.K. |