The HA-TiO2 coating in the PT-coating™ process successfully has made by biomaterial research group of NANO-TARACOATING Company. This technology used for increasing the biocompatibility of Titanium (Ti) alloys like Ti–6Al–4V alloy . The structural properties evaluation of nano-hydroxyapatite (nHA) coated can confirm this proof. The nHA coating has the benefit to enhance the biological properties and bioactivity of the implants due to their nano-sized structure. The formation of nHA on surface were characterized with Scanning electron microscope (SEM), x-ray diffraction (XRD), fourier-transform infrared spectroscopy (FTIR) and Energy-dispersive spectroscopy (EDS).