Demonstrates enhanced mechanical properties in Ti-Al-Mo alloys, implying better performance in critical applications.
Titanium alloys are widely used in aerospace, biomedical and energy applications, but the low hardness and limited plastic deformation resistance of commercially pure titanium (CP‐Ti) remain key limitations. In this study, Ti‐ y Al‐1Mo ( y = 3, 5 and 7 wt.%) alloys were fabricated via plasma‐activated sintering and evaluated using instrumented nanoindentation. All alloys achieved near‐full densification and exhibited predominantly α ‐Ti with minor β ‐Ti and localised Mo‐rich regions, consistent with composition‐driven phase evolution. Nanoindentation revealed a strong composition‐dependent improvement in mechanical response: at 100 mN, hardness and elastic modulus increased from 2.5396 GPa and 113.6 GPa (CP‐Ti) to 5.4139 GPa and 149.8 GPa for Ti‐7Al‐1Mo. A similar trend persisted at 200 mN, with a slight hardness reduction attributed to the indentation size effect. Yield strain and yield pressure values further confirmed enhanced plastic deformation resistance. One‐way ANOVA verified that these improvements are statistically significant. The combined α ‐stabilising and β ‐stabilising effects of Al and Mo highlight the effectiveness of dual alloying in tailoring the nanomechanical properties of near‐α titanium alloys.
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Jeje et al. (2026) studied this question.
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