Knife blade performance is affected by several characteristics including edge geometry, surface finish, and the parent material properties as well as the heat treatment used. In this project, the effect of changing heat treating parameters of CPM-M4 steel was studied. The project objective is to better understand how blade steel heat treating parameters can be controlled to enhance specific blade performance features, such as edge retention. The approach utilized will be experimental and will involve hardness, impact toughness, 3-point bend, and CATRA tests to characterize knife blade performance, as well as scanning electron microscopy, electron backscatter diffraction, and nanoindentation to characterize the microstructure. The data generated in the project can be utilized to evaluate the ideal heat treatment combination to produce desired blade properties as well as to relate mechanical properties to microstructure evolution. Based on this study, a treatment using lower austenitizing and tempering temperatures proved most ideal.