▎ 摘　　要

Although the titanium complex grease has attracted increasing attention, its reaction samples at each stage have rarely been presented and characterized; besides, there is still room for the improvement of its tribological properties. In this study, two kinds of titanium complex greases were synthesized from different base oils. Samples at each reaction stages of the greases were extracted and characterized. The effects of graphene on the tribological properties of the titanium complex greases were investigated using a four-ball tester. It was found that the graphene could improve the tribological properties of titanium complex grease. The main reason was that graphene could promote the formation of boundary film and tribo-chemical reaction film on the friction surface.