MONTREAL, QUEBEC--(Marketwired - Dec. 18, 2015) - Argex Titanium, Inc. (TSX:RGX) ("Argex" or "the Company"), an emerging producer of high-grade titanium dioxide (TiO2) used as white pigment in paint, plastic, paper, cosmetics and other applications, announced today that it signed a Letter of Intent with an industrial group from the Gulf Region to initiate a two-month due diligence on the Company.