Molybdenum disulfide (MoS 2) films have emerged as a critical material in space lubrication systems, but the escalating operational demands for high-load capacity and extended service durability in spacecraft mechanisms necessitate substantial enhancement of MoS 2-based coatings. To address this challenge, the Ti-Ag/MoS 2 composite films were prepared by unbalanced magnetron sputtering technology. Comprehensive characterization using advanced analytical techniques including FESEM, HRTEM, and XRD revealed that titanium doping induces a structural transformation in Ag/MoS 2 coatings, promoting the formation of a dense amorphous structure. Notably, the crystalline ordering exhibited an inverse correlation with titanium concentration. The friction and wear properties of Ti-Ag/MoS 2 films were evaluated in vacuum under combined high loads and rotational speed. It is confirmed that MoS 2 films binary-doped with Ti and Ag had a significant improvement in friction and wear properties; the optimized Ti (12.8 at%)-Ag/MoS 2 film achieved an ultra-low steady-state friction coefficient of 0.01 and wear rate of 6.0×10 -8 mm 3/N•m. In practical bearing applications, the Ti(12.8 at%)-Ag/MoS 2 coated components demonstrated a 29% reduction in average friction torque and a 35% decrease in torque fluctuation amplitude compared to Ag/MoS 2 counterparts. These results confirm that the ternary doping strategy successfully reconciles the inherent conflict between friction reduction and wear resistance.