Micro-arc oxidation( MAO) and hydrothermal synthesis( HS) technologies were used to prepare bio-film on the surface of titanium alloy.Surface morphologies and formation procedures of the films at various stages were observed by scanning electron microscope,and element and phase compositions of biological membrane layer were analyzed by energy dispersive spectroscopy and X-ray diffractometer.The cohesion between films and substrate materials was measured by scratching test,and the corrosion resistance of sam...