Delving into the paper: Al has defo been used for deoxidizing Ti but they claim it's "inadequate" The stability of al oxyhalide with respect to al oxide and al

Delving into the paper: Al has defo been used for deoxidizing Ti but they claim it's "inadequate" The stability of al oxyhalide with respect to al oxide and al halide is the key here? Not sure if that has been "adequately" explored either, especially in experiment (For the sake of more collaborative conversations on HN, not just dissfests :)