Abstract: Under the same heating temperature， rolling pass and pressure reduction by using vacuum roll cladding(VRC)，the interfacial microstructure and mechanical properties of three groups titanium/steel composite plates were studied after one of three different surface treatment methods which were wire brush grinding， pickling and polishing machine with water. The influence of surface treatment on the interfacial bonding properties was analyzed. The results showed that a uniform and continuous TiC layer is formed at the bonded interface when the surface treatment of the polishing machine with water is carried out. The fracture surfaces are full of dimples， the interfacial shear strength is stable with the average shear strength of 242.6MPa. However， the discontinuous TiC layers are formed in the interfaces of the titanium/steel plates subjected to the other two surface treatments and the shear strength of these two plates cannot meet the national standard.

Key words: vacuum rolling cladding(VRC), surface treatment, electron-beam welding, analysis of microstructure, interface bonding performance