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To have a better understanding of fretting wear for titanium alloys, the effect of wear particles distribution on coefficient of friction, wear volume, surface topography and danage mechanisms at various displacement amplitudes was investigated. The test results showed that the displacement amplitude has a significant influence on the distribution of the fretting wear particles. The ‘flake-like’ delamination formed by the central adhesive teard was stacked into a ‘ridge’ in a direction perpendicular to the fretting at a relative low fretting-amplitude.At a medium amplitude,the debris particles were scattered on the contact surface.When the amplitude was even increased,‘cluster-like’ debris were accumulated into a ‘ridge’ paralleled to the direction of the fretting.The various distribution of the wear particles leads to the change in the wear mechanisms from the adhesion to abrasive with slight adhesion,and finally the adrasion accompanied the oxidative wear.