“…Emerging as a key material for aerospace applications, metastable -titanium alloys have been recognized as having the best potential for deep-hardenability amongst all classes of Ti alloys. Representative examples of deep-hardenable -titanium alloys include Ti-10V-2Fe-3Al [1,2], Ti-3Al-8V-6Cr-4Mo-4Zr (also known as Beta-C) [3,4], Ti-11.5Mo-6Zr-4.5Sn (Beta-III) [5,6], and more recently, Ti-5Al-5Mo-5V-3Cr [7][8][9][10]. However, the fundamental aspects governing the hardenability of -alloys remain incompletely understood.…”