AbstractThe following reactions, carried out in the absence of solvents, has been studied: α‐TiCl3+ Al(CH3)3at 20°C., β‐TiCl3+ Al(CH3)3at 65°C., α‐TiCl3+ Al(CH3)2Cl at 20 and 65°C., and α‐TiCl3+ Al(C2H5)3between 30 and 65°C. It appears that a general reaction mechanism, such as discussed in the preceding paper of this series, applies to all these reactions between TiCl3and aluminum alkyls. The differences in overall stoichiometry between some of these systems may be linked to differences in stability of the intermediate TiC bonds. In the case of α‐TiCl3+ Al(CH3)2Cl, alkylation is probably accompanied by fixation of the AlCH3Cl2on the