Titanium alloys are very useful in area of aeronautics and astronautics.They have good performance of light weight,high intensity and corrosion resistance,but have poor wear resistance.In order to improve their abrasion resistance,the specimens of TC4,TA7 titanium alloys were titanium plated by sputtering,and then Ti atoms were implanted into the surface of specimens by (N ++N + 2) ion beam.On the basis of the above ion implantation,some specimens were implanted by C + ion beam additionally.The results of t...