Abstract
1. We investigated the mechanical properties, structure, and phase composition of binary alloys with up to 30% Mo, V, and Cr, and up to 60% Nb, and ternary and more complex alloys with up to 40% refractory metals Mo, Nb, V, and Cr. 2. Alloys with a high concentration of alloying elements (30–40%) have a lower plasticity than α and α+β alloys. 3. Most of the β titanium alloys investigated have alow heat resistance and high ductility at 650° compared with existing α and α+β alloys. The Ti-Mo-Nb-Cr and Ti-Mo-Nb-V-Cr alloys with a total of 30–40% alloying elements are the most heat resistant. 4. The heat resistance of β alloys can be increased by combined alloying of the β solid solution and intermetallic hardening.
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