In order to improve the wear resistance and anti-corrosion behaviors of Ti6Al4V (TC4) alloy, polished samples were implanted with silver (Ag) ions by plasma immersion ion implantation (PIII) technique. The phase composition and element concentration-depth distribution in modified layer were characterized by X-ray diffraction (XRD) and Auger electron spectrum (AES). Corrosion resistance, microhardness, friction and wear behaviors of PIII-TC4 alloy changed with the Ag ion implantation dose. XRD analysis reveals that the surface modified layer consists of Ag and a small amount of TiAg phases. AES results show that Ag atomic peak concentration is 9.88%, about 14.4 nm from the surface. The maximum nanohardness and elastic modulus of PIII-TC4 alloy increases by 62.5% and 54.5%, respectively. The lowest friction coefficient reduces from 0.78 to 0.2. The test result of potentiodynamic polarization in 3.5% NaCl saturated solution indicates that the sample of Ag ion dose at 1.0 x 10(17) ions/cm(2) has the best corrosion resistance with the lowest corrosion current density and the least porosity. (C) 2012 Elsevier B.V. All rights reserved.