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The equilibrium between titanium ions (Ti 2+ , Ti 3+ ) and metallic titanium (Ti) in NaCl-KCl equimolar molten salt was investigated using TiCl 3 and Ti. Equilibrium experiments were carried out in metal container of titanium or stainless-steel at 740°C. The concentrations of titanium ions were determined by chemical methods consisting of continuous three steps. Ti 2+ and Ti were quantitated by H 2 evolution method. Ti 3+ was quantitated with titration by Fe 3+ . As the result, the concentration of Ti 2+ was higher than that of Ti 3+ . The concentration quotient, K c = (x Ti3+ ) 2 /(x Ti2+ ) 3 , depends on the concentration of Ti 2+ . The value of K c at 740°C is recommended to be 5.9 at x Ti2+ = 0.02 and 2.6 at x Ti2+ = 0.07 respectively.

Quantitative Analysis of Titanium Ions in the Equilibrium with Metallic Titanium in NaCl-KCl Equimolar Molten Salt