Abstract
Titanium‐oxygen alloys dissolve in 
according to the reaction 
, with a maximum for 
, which means that 
dissolves without hydrogen evolution. Higher titanium oxides do not dissolve in 
. The determination of the end point of the above reaction was affected by a secondary, but very slow reaction 
. Nevertheless, the experimental results agreed within ±2% for the first reaction for titanium containing oxygen up to 33 at.%. Titanium‐oxygen alloys do not represent titanium oxygen solid solutions but solid solutions of titanium oxides and titanium metal.