In this study, a new Ti‐25Ta‐25Nb (mass%) β alloy was synthesised by cold crucible semi‐levitation melting. After melting, each ingot was solution treated in the β‐phase domain and water quenched in order to obtain a fully recrystallised homogeneous β‐phase microstructure. To evaluate the bio‐corrosion property of this new alloy, corrosion tests (cyclic potentiodynamic and linear polarisation, EIS) and surface analysis (SEM) were carried out in Ringer solution at different pH values (acid, neutral and basic). The results indicated that the corrosion resistance of the Ti‐25Ta‐25Nb alloy is quite higher than that of the commercially pure CP Ti alloy. These results show that this new alloy possesses all the characteristics necessary for its long‐term use as medical implants.