Microstructure and phase transformation on milled and unmilled Ti induced by water quenching

• WQ induced fishbone-type micro-twins 1200 °C quenched Ti.
• α′, α′′ and FCC metastable phases were induced.
• On 30 h milled quenched, metastable α′, tetragonal and FCC phases were obtained.
• (0+30) h mixture quenched yielded metastable BCC, α′ and tetragonal.
• FCC and BCC phases were stress-induced phases.

Water quenching of unmilled Ti compact has yielded martensitic-type laths and fishbone-type twinned microstructures, with α′, α′′ and FCC phases induced. Upon quenching 30 h milled and (0+30) h mixed powders at 1200 °C, α′, FCC, tetragonal and BCC phases were detected using XRD.