Abstract: In order to improve the friction and wear properties of TC11 titanium alloy, Zr layer had been deposited on the TC11 alloy surface by double glow plasma technique. Phase analysis, microstructure observation and micro area composition analysis of the layer were performed, and friction and wear tests were carried out at different temperatures. The results show that the layer with dense microstructure and thickness of 25 μm, and mainly composed of α-Ti could be obtained on the surface of TC11 titanium alloy. Zr was mainly solid dissolved in α-Ti. The friction coefficient of the layer was smaller than that of the TC11 alloy at room temperature and 450 ℃. The wear mechanisms of the TC11 alloy were adhesive wear and abrasive wear, and abrasive wear for the layer at room temperature. When the temperature was 450 ℃, the mechanisms of the worn scar at the center of the alloy were adhesive wear and peeling, and that on the edge was abrasive wear; the mechanism of the layer was abrasive wear with slight peeling.