A new electrochemical process for the surface preparation of titanium and alloys has been realized (patent pending). This comprises an anodic treatment in concentrated alcaline bath, the applied voltage being ≥ 30 V, and a successive nearly complete reduction of the oxide layer thus obtained by means of a treatment in alternative current in acid bath. This leaves a very labile film, just sufficient to protect the underlying surface before plating. Depositis of Pt, Rh, Ir, Ru, Ni, Co, Cr, Au, Ag, Cu, Pb, Sn, alloys, and so on, may be obtained, also very thick and presenting exceedingly good adhesion and absence of porosity.