Under the complex environment，Titanium alloy not only has decent wear-resisting performance, but also the ability to resist the corrosion of acidic medium. This article studies the electrochemical properties and immersing-corrosion resistance of the Titanium sample, whose surface was Hydrogen-free carburized, in HCl and H2SO4 solution by using the method of electrochemistry and eroding. The result shows that after being Hydrogen-free carburized, the corrosion-resisting performance of Titanium sample which was immersed in HCl and H2SO4 solution is significantly improved.