Ca-containing, particularly CaTiO3, titania films were prepared by micro-are oxidation (MAO) of Ti in an electrolytic solution containing calcium acetate monohydrate (CA), and their apatite-inducing ability was evaluated in a simulated body fluid (SBF). The phase, Ca content, and morphology of the films were found to be strongly dependent on the applied voltage. The CaTiO3-embedded titania was obtained at higher voltages (> 300 V). When immersed in SBF, no apatite was induced in all the MAO specimens irrespective of the presence of CaTiO3, which has been claimed to be an apatite inducer. However, after a hydrothermal treatment at 250 degrees C, apatite was formed on the surfaces of the CaTiO3-embedded titania after 28 days, which was closely related to the formation of amorphous Ca(OH)(2) and presumably surface Ti-OH groups.