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Ti and Zr metals are the most common bio-metallic materials that are frequently employed in a variety of orthopedic applications due to their excellent biocompatibility and mechanical stability. However, these metals still suffer from poor wear and corrosion resistance in the physiological environments. To mitigate these limitations, Ti–50Zr alloy was fabricated using the Laser Engineering Net Shape (LENS™) additive manufacturing technique. At 600 °C for 2 and 6 h, the samples underwent thermal nitridation (TN) and thermal oxidation (TO), respectively. The assessment of the surface treatments on the in-situ grown nitride and oxide coating thickness, phase identifications, and in-vitro tribological properties of Ti–50Zr alloy were carried out in simulated conditions. The results showed that thermal treatments could significantly change the film thickness, hardness, wear resistance, and corrosion resistance properties of Zr–50Ti alloy. The sample that underwent nitriding at 600 °C for 6 h showed the highest in-vitro wear resistance. Compared to thermally oxidized samples, nitridation of Ti–50Zr alloy can be used for bio implant applications, with adequate mechanical stability, excellent wear, and corrosion resistance.