The aluminothermic reduction of titanium oxide was studied at 1973 K in an atmosphere of argon and alumina crucible. The overall reaction, TiO2+4/3Al=Ti+2/3Al2O3, was finished within about 10 min.When the molar ratio of aluminum to titanium oxide (XAl⁄XTiO2) was 4/3 (which corresponds to the stoichiometric ratio), an alloy containing 5 mass% oxygen and 15 mass% aluminum was obtained. If the ratio was increased, aluminum content increased and oxygen decreased. For an intermetallic composition where 36 mass% of aluminum is necessary, oxygen content was 1.5 mass%. The possibility of reducing oxygen content was demonstrated by decreasing the activity of alumina in the slag.
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Maeda et al. (1993) studied this question.