In order to investigate the tribological performance of WC-10Co-MoS2@Ni self-lubricating cemented carbide and TC4 titanium alloy,cemented carbide specimens with different contents of MoS2@Ni were prepared by hot press sintering,the microstructure and mechanical properties of self-lubricating cemented carbide were analyzed by the scanning electron microscopy,3D profilometer and Vickers hardness tester,etc.The tribological properties of cemented carbide and titanium alloy under dry friction,cutting fluid and cryogenic conditions were studied by reciprocating friction tester.The results show that with the increase of MoS2@Ni content in the cemented carbide,the surface pores decrease and the mechanical properties slowly decline.The friction coefficient decreases with the increase of MoS2@Ni content under dry friction,cutting fluid and cryogenic conditions.Due to the adhesion of titanium alloy,the lubrication effect of MoS2 is hindered during dry friction,and the main wear forms are adhesion and oxidation.In the cutting fluid environment,the abrasive wear and adhesive wear are dominant.In cryogenic environments,oxidation and adhesion are reduced,and the main wear form is abrasive wear,accompanied by delamination.