Groove surface textures with different orientations and spacings were prepared on the Ti–6Al–4V alloy by using a laser. Fretting tests (rubbed with a Ti–6Al–4V ball) were conducted under different textures, and the coefficient of friction (COF) curves, system deformation and wear morphologies were analysed in detail. The groove orientations to the fretting direction affected the fretting wear behaviour through the following ways: (1) Fretting tests on different groove orientations resulted in different fretting loop shapes at the initial stage of fretting wear. (2) The COF curves of fretting test on perpendicular grooves and 45° grooves were similar. COF presented a sharp increase after approximately 1000 cycles under relatively low loads. The COF curves of fretting test on parallel grooves and untextured surface were similar. Only a small oscillation of COF was observed during the whole fretting tests. (3) When fretting was run in gross slip regime, the magnitude of system deformation was perpendicular grooves, no-texture samples, 45° grooves, and parallel grooves in order. The above results may have resulted from the influence of surface textures on the formation and development of wear debris. For the perpendicular grooves, high pressure was recorded in partial slip regime cracks, and peeling appeared on the convex platform of samples with the groove spacing of 80 μm, and this phenomenon promoted the formation of debris. Moreover, the perpendicular grooves prevented debris from spilling out of contact areas. For the parallel grooves, the filling mechanism of grooves was found, in which the material in the upper layer gradually squeezed the material in the lower layer toward the centre and bottom of the groove, and the parallel grooves accelerated debris from spilling out of contact areas. Therefore, groove surface textures may adjust the fretting regime of titanium alloys by changing the orientation and spacing, which could provide a new tribology design for fretting friction pairs.

使用激光在 Ti-6Al-4V 合金上制备了具有不同取向和间距的凹槽表面纹理。在不同质地下进行微动试验（用 Ti-6Al-4V 球摩擦），详细分析了摩擦系数（COF）曲线、系统变形和磨损形貌。微动方向的凹槽取向通过以下方式影响微动磨损行为：（1）不同凹槽取向的微动试验导致微动磨损初始阶段的微动环形状不同。(2)垂直槽和45°槽微动试验的COF曲线相似。在相对较低的负载下大约 1000 次循环后，COF 呈现急剧增加。平行凹槽和无纹理表面微动测试的 COF 曲线相似。在整个微动测试期间仅观察到 COF 的小幅振荡。(3) 在粗滑移状态下微动时，系统变形量依次为垂直凹槽、无纹理样品、45°凹槽和平行凹槽。上述结果可能是由于表面纹理对磨屑形成和发展的影响。对于垂直凹槽，局部滑移状态裂缝中记录到高压，凹槽间距为80μm的样品凸台上出现剥离，这种现象促进了碎屑的形成。此外，垂直凹槽可防止碎屑从接触区域溢出。对于平行凹槽，发现了凹槽的填充机制，其中上层材料逐渐向凹槽中心和底部挤压下层材料，平行凹槽加速碎屑从接触区域溢出。因此，凹槽表面纹理可以通过改变取向和间距来调整钛合金的微动状态，这可以为微动摩擦副提供新的摩擦学设计。