Abstract:Micro-arc oxidation(MAO) and hydrothermal synthesis(HS) methods were used to prepare hydroxyapatite（HA）, rutile and anatase TiO2 composite ceramic film on the surface of TA2 titanium．The experiment observed and analyzed morphology, elemental composition, phase composition and roughness of the film, and explored effect of hydrothermal time on characteristic and surface energy of the ceramic film on the surface of TA2 titanium. The results demonstrated that: after the hydrothermal treatment, large mounts of regular columnar and needle-like HA particles formed on the film, which is mainly consisted of such elements as Ti, O, Ca and P. With hydrothermal time prolonging, the HA particles were increased in number and volume, and surface roughness of the film went down at first, and then went up. At the initial stage of hydrothermal time surface energy of the film showed upward trend with the decrease of surface roughness. The contact angle of water on the film, between 116.0 ° ~ 140.2 °, was larger than that of water on TA2 titanium, which implied that hydrophobicity of the film is enhanced. Compared with TA2 titanium, surface energy of the film which is between 150.7 mJ ? m-2 ~ 282.9 mJ ? m-2, increased more than four times, with the change of its roughness being the major factor.