Alkali-heat treated titanium induces the rapid hydroxyapatite (HA) deposition on its surface and showed obviously improved in vitro and in vivo properties. In this study, the pure titanium is subjected to alkali washing and induction heat treatment (IHT) to form a hierarchical micro-nano scale porous structure on the sample surface. The morphology, phase, roughness, wettability, adhesive strength of the coating with the substrate and in vitro HA deposition were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), laser scanning confocal microscope (LSCM), contact angle measurement, nanomechanical test instrument and immersion in 1.5 × SBF, respectively. The results show that compare with heating in the furnace (FH) of acid-etched and alkali-treated (SLAA) samples, a more uniform and porous surface with improved roughness, wettability, and adhesive strength of the coating with the substrate were achieved by IHT. Especially, the high in vitro bioactivity indicated by rapid HA deposition was obtained by IHT of the SLAA surface. Given the above, this research of the alkali-heated titanium fabricated by induction heating may promote a more potential clinical application of the alkali-heat treatment.

碱热处理的钛诱导羟基磷灰石（HA）迅速沉积在其表面，并显示出明显改善的体外和体内特性。在这项研究中，纯钛经过碱洗和感应热处理（IHT）以在样品表面上形成分层的微纳米级多孔结构。通过扫描电子显微镜（SEM），能量色散光谱（EDS），X射线衍射（XRD），激光扫描共聚焦技术研究涂层的形态，相，粗糙度，润湿性，与基材的粘附强度以及体外HA沉积显微镜（LSCM），接触角测量，纳米机械测试仪和浸入1.5×SBF中。结果表明，与酸蚀和碱处理（SLAA）样品在熔炉中加热（FH）相比，通过IHT，可以得到更均匀，多孔的表面，并具有改善的粗糙度，润湿性和涂层与基材的粘合强度。特别地，通过SLAA表面的IHT获得了由快速HA沉积指示的高体外生物活性。鉴于以上所述，对感应加热制备的碱热钛的研究可能会促进碱热处理的更多潜在临床应用。