Abstract: To improve the bioactivity of β -type Ti-Nb-Zr alloy, 20 wt% CPP (calcium pyrophosphate) was added as bio-ceramic, and then the 20CPP/Ti-35Nb-7Zr composites were fabricated by spark plasma sintering (SPS) technology. The study was focus on microstructure and mechanical properties of the composites sintered at different temperatures (1 000-1 200℃). The influence mechanism of microstructure evolution on the mechanical properties was revealed. Results show that the composites are consisted of β -Ti phase matrix, a little residual α -Ti phase and metal-ceramic phases (CaO, Ti₂O, CaTiO₃, CaZrO₃ and Ti_xP_y). With increasing sintering temperature, the β -Ti phase and metal-ceramic phase increase gradually. The changes of metal-ceramic phases from particle-like precipitate to a continuous network structure are caused by the fierce reaction between metal and ceramic, which separates the matrix. Compressive elastic moduli and compressive strength of 20CPP/Ti-35Nb-7Zr composites present substantial increases (64.0 to 71.4 GPa) with increase of sintering temperature due to the morphological changes of metal-ceramic phases. Therefore, it will be beneficial to improving mechanical properties by controlling the morphological structure of metal-ceramic phases in 20CPP/Ti-Nb-Zr composite.