Laser cladding of NiCrBSi-TiC composite coatings on Ti-6Al-4V alloy substrate was carried out, and the microstructure of the clad layer was characterized by SEM and TEM. The friction and wear properties of the clad layer were examined in atmosphere and in vacuum (10-5 Pa). The results showed that in the clad layer, the dispersive undissolved TiC particles and liquid-precipitated TiC were distributed in the matrix consisting of γ-Ni dendrites and γ-Ni+M23 (CB)6 eutectics, the liquid-precipitated TiC having a clear and smooth interface with matrix. The epitaxial growth of TiC was found at the interface of undissolved TiC particles with γ-Ni matrix. In atmosphere, the friction coefficients of the clad layer were ranged from 0. 3 to 0. 4, and the wear rate of clad layer was a magnitude lower than that of Ti-6Al-4V alloy. In vacuum, the friction coefficients of clad layer varied from 0. 4 to 0. 5, and the wear rate of clad layer was half as that of Ti-6Al-4V alloy.