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[References: 10 tit.]

The aim of this study is to reveal mechanical behavior of the modified titanium surface via TiO2 nanotubes and hydroxyapatite (HA) coating deposition. TiO2 nanotubes were fabricated using anodic oxidation. The electrolyte was prepared by mixing 0.4 wt.% solution of NH4F in 54 ml of ethylene glycol and 5 ml of deionized water. The HA was deposited onto nanotubes by means of RF-magnetron sputtering. The obtained coating was characterized by scanning electron microscopy (SEM) and nanoindentation. The increase in the Young's modulus ( E ), nanohardness ( H ), index of plasticity of the materials ( H / E ) was used to describe resistance of the material to plastic deformation ( H 3/ E 2). The HA coating resulted in a 2 times increase in the nanohardness ( H = 0.38±0.10 GPa to H = 0.78±0.38 GPa at a 200 nm depth). The combination of TiO2 nanotubes and HA coating is a perspective for biomedical application.