An apatite coating by an alternate soaking was undertaken on commercially pure titanium (cpTi) treated with concentrated acid and alkaline solutions. X-ray diffraction (XRD) patterns indicated that the diffraction peak intensities assigned to hydroxyapatite (HAp) increased with the reaction cycle. Fourier transform infrared spectroscopic study (FTIR) showed similar results with XRD. Scanning electron micrographs (SEM) of the deposits showed no observable change after the vacuum firing. It was confirmed that the reaction cycle greatly affected on the deposited amount of apatite on cpTi plates using the alternate soaking and the vacuum firing erased TiH2 formed during the acid etching, but was irrelevant to the crystallinity of the apatite.