Microstructures of duplex-phase titanium after heat treatment at different temperatures (960×1280 pixels). (a) Temp = 860 °C, (b) Temp = 910 °C, (c) Temp = 920 °C, (d) Temp = 930 °C, (e) Temp = 940°C, (f) Temp = 950 °C, (g) Temp = 960 °C, and (h) Temp = 970 °C.