The Al₂O₃ ceramic was brazed to GH99 superalloy using AgCuTi filler alloy, The influence of the process parameters on the mechanical property of the joints was studied and the fracture location of joints under different process parameters was analysed. The results show that, With the increasing of brazing temperature, the shear strength of joints decreased after increasing to a maximum, The maximum was obtained at 900℃,Which is 127.24MPa. When the brazing temperature is lower, the fracture is mostly in Al₂O₃/filler side, With the increasing of brazing temperature, The TiNi₃ reaction layer is gradually thickening and then parts of the fracture is in the TiNi₃ reaction layer/filler interface; At 900℃, With the extension of the holding time, The shear strength of joint gradually decreased. The joints is mainly fractured in the Al₂O₃ ceramic/filler interface when the holding time is short. When the holding time is too long, the reaction layer extends into the middle of the solder and the thickness of TiNi₃ layer is greatly increased, and the micro crack is produced in the reaction layer, Which cause the strength of the joint greatly reduced, And then the joint is partly fractured in the filler metal and TiNi₃ reaction layer.