Surface bioactivity is a crucial characteristic of Ti-based hard tissue implants as it enables integration with living bone. A nanostructured layer of TiO₂ obtained through anodization is believed to enhance bioactivity. This study aimed to investigate the formation and crystallization of a nanostructured oxide layer synthesized on the surface of Ti-35Nb and Ti-35Nb-5Ta samples. The nanostructure was crystalized using heat treatments between 350 °C and 900 °C. In both compositions, anatase was formed between 375 °C and 500 °C, above this temperature anatase was transformed in rutile. Additionally, a doped Nb₂O₅ phase was also detected between 700 °C and 900 °C. In this same temperature range, the nanostructured oxide layer lost its morphological structure. The presence of Ta in the Ti-Nb-Ta substrate supported the anatase and (Nb)₂O₅ crystallization at lower temperatures if compared to the Ti-Nb substrate.

表面生物活性是钛基硬组织植入物的一个重要特征，因为它能够与活骨整合。_{通过阳极氧化获得的TiO 2}纳米结构层被认为可以增强生物活性。本研究旨在研究 Ti-35Nb 和 Ti-35Nb-5Ta 样品表面合成的纳米结构氧化物层的形成和结晶。通过 350 °C 至 900 °C 的热处理使纳米结构结晶。在两种组合物中，锐钛矿在375℃至500℃之间形成，高于该温度锐钛矿转变为金红石。此外，在 700 °C 至 900 °C 之间还检测到了掺杂的 Nb ₂ O _5相。在同一温度范围内，纳米结构氧化物层失去了其形态结构。与Ti -Nb基底相比，Ti-Nb-Ta基底中Ta的存在支持锐钛矿和(Nb) ₂ O _{5在较低温度下结晶。}