In order to investigate the frictional wear performance and fine damage mechanism of polytetrafluoroethylene (PTFE)-filled copper mesh composites,full-life wear tests were conducted using a reciprocating friction and wear tester,and the material friction surface and wear chips were characterized by scanning electron microscopy,optical microscopy and three-dimensional morphometry.The results show that the full-life (202 h) wear process of PTFE-filled copper mesh composites is mainly divided into three stages:wear-in,stable wear and severe wear.In the first 20 h wear stage,the friction coefficient gradually increases,and a large amount of PTFE is extruded under high load,resulting in a large wear rate,while a transfer film is generated,and the failure is mainly in the form of spalling under mechanical shear.In the 20 h to 190 h stable wear stage,the friction coefficient first decreases and then increases and has a large fluctation,and the wear rate tends to be stable.The wear mechanism is mainly abrasive wear,and the abrasive chips change from lamellar to powder.The roughness of the friction surface gradually decreases and the wear is not uniform.Through microscopic characterization,it is found that the copper mesh weave junction and the convex peak are seriously worn.Through force analysis,it is found that the copper mesh weave junction and the convex peak have stress concentration phenomenon,which corresponds to the area of serious wear in the test,the test and numerical simulation correlate.In the 190 h to 202 h severe wear stage,the friction coefficient and wear amount further increase,and the wear resistance and lubrication performance of the material decrease sharply,and finally the material is worn through and failed.