In paper, it prepared the (100-x)B4C-xTi(wt.%) ceramic that through the hot press sintering in 1680℃, the effect of Ti to the microstructure and the mechanical properties of B₄C ceramic is studied. The results showed: it promoted the sintering of B₄C ceramic through Ti doping, the relative density would increase firstly, then it tends to increase slowly down. The relative density of the sample is 99.5%, when Ti doping get up to 40wt.%. The XRD result in the sample, in addition to the B₄C and unreacted Ti besides, there are TiB₂ and TiC phase,and with the increasing Ti content, the diffraction peaks of those two phase gradually increased; With the addition of Ti, bending strength, hardness and fracture toughness of samples increased, the doping amount was 40wt.%, respectively, up to 481±24MPa, 828±41Kgf.mm_-2, 18.55±0.9MPa.mm_1/2. It analysis that because Ti interface reaction with B₄C, generated at the interfaces of TiC and TiB₂ phase transition layer, connecting the B₄C substrate and Ti, have played an important role in bridging toughening, make the material mechanical performance is improved.