The bonding strength of hydroxyapatite(HA)/Ti FGM implants fabricated by powder metallurgy was investigated by means of the in vivo implanting in rabbits and the shear strength testing. It was shown that the HA/Ti FGM possess a good biocompatibility and osteoconductivity, and can be integrated with bone. After implanted for three months, the FGM implants and the new bone formed around became one bony body. The bonding strength between FGM implants and the surrounding bone tissues raises quickly with increasing the implanting time, and can reach 6.49MPa after implanted for three months, higher than that of dense pure HA or Ti implants. Fractography observations reveal that the fracture occurred in the new bone near the interface during the shear testing of HA/Ti FGM implants, which indicates that its interfacial bonding strength even exceeds the shear strength of new bone tissues.