Abstract:A fracture behavior of PVD coated ceramic film deposited on Ti-6Al-4V specimens was evaluated for a fretting fatigue geometry in which specimens were contacted on both sides with pads of the similar material. Behavior against the ceramic film coated specimens was characterized through the determination of fretting fatigue strength up to 10 7 cycles. Fretting damage of specimen surface was characterized by SEM and surface profilometer. Ceramic film coating has a great effect to improve the fretting fatigue strength. From the experimental results of S-N tests it is clear that until about 10 6 cycles ceramic coating is effective to improve the fretting fatigue strength. But over 10 6 cycles the strength is lower than that of uncoated specimens. The enhanced fretting fatigue resistance can be attributed to the improved hardness of ceramic film due to change of bias voltage during the film deposition. It has also been concluded that there is smaller influence of bias voltage on fatigue strength below and about 10 6 cycles; whereas, over 10 6 cycles, fatigue strength is clearly changed by bias voltage as well as the contact pressure.