As a result of the demand for increasing the operating life of aeronautic parts, it is sought in this work to optimize the mechanical characteristics of a bearing submitted to marine environment. Phase transformations during high speed austenizing have been studied together with the influence of thermal stresses due to induction heating. It is observed that there are two ways to obtain the best mechanical properties among which the shortest cycle could be used to reduce heat treatment time of highly alloyed cold work steels.