To further improve the performance of TC4 alloy, especially corrosion resistance to the seawater, 1wt%, 2wt% Cu and 1wt% Ag were added into TC4 alloy to fabricate three kinds of alloys of TC4-Cu and TC4-Ag with VAR. The corrosion behavior and characteristics of different kinds of alloys in artificial seawater were researched by electrochemical methods. The result shows that the corrosion potentials of TC4 with addition of Cu and Ag are raised and their corrosion currents are decreased, so the corrosion resistance of TC4 alloy can be improved effectively.