<p>The anodic oxidation process was successful in fabricating consistently ordered, well-bounded and high-density TiO₂ nanotube arrays on the Ti-13Nb-13Zr alloy using an ethylene glycol electrolyte containing 0.3 wt.% ammonium fluoride. The microstructure, elemental composition, wettability and corrosion resistance of the TiO₂ nanotube arrays were investigated. The enhanced uniformity was achieved on nanotube arrays by anodizing for 30 minutes at 50&#xa0;V. The elements Ti, O, F, Nb and Zr were detected in the nanotube arrays. The average contact angle values ranged from 23.6° to 41.7°, demonstrating a hydrophilicity for the anodized samples. Electrochemical assessments indicated that the specimens coated with TiO₂ nanotube arrays presented enhanced resistance corrosion. The mechanism of the enhanced hydrophilicity was discussed by proposing a liquid–solid contact model. The enhancement of hydrophilicity and corrosion resistance of the TiO₂ nanotube arrays will be beneficial for improving the biocompatibility and service life of Ti-13Nb-13Zr alloys. </p>