Abstract：Titanium (Ti) and its alloys have become the preferable high-load bone substitute materials and successfully been used in medical implants due to their good biomechanical and biochemical properties. However, the elastic modulus of Ti and its alloys are not matched with bones tissue and may result in so called "stress-shielding". Hydroxyapatite (HA) is the main ingredient of natural bone mineral substance, so that it has excellent bioactivity and biocompatibility. But its application is limited because of the low strength, brittleness, and worse load-carrying capacity. Based on researches of preparation and the fundamental property of Ti-HA composites，present progress of Ti-HA composites reinforced by various nano-materials and doped by rare earth element were summarized in this paper.
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2017, Vol. 24 
