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At what temperature does titanium change from the alpha phase to the beta phase?

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A periodic table element tile for titanium displays its atomic number 22, symbol Ti, atomic weight 47.867, electron configuration, and name. Icons indicate it is a solid, transition metal with a hexagonal crystal structure and equal relative strength. — titanium Properties of titanium.

In pure titanium, the transformation from the alpha ( $α$ ) phase to the beta ( $β$ ) phase occurs when the metal is heated above 883 °C (1,621 °F).12

While pure titanium undergoes this transition at a specific temperature, the presence of alloying elements can significantly alter this threshold. The temperature at which a 100-percent beta phase can exist is known as the beta transus, which can range from 700 °C (1,300 °F) to 1,050 °C (1,900 °F) depending on the specific composition of the alloy.1