Reset transformations sets the transformations on the selected objects back to zero. This undoes any transformations since the object was created or the last “freeze”.
Freeze transformations makes the current transformations on the selected objects be the objects’ zero position.
Modify > Reset Transformations, Freeze Transformations >
Use the options to control which types of transformations (translate/move, rotate, scale, joint orientation) are reset or frozen.
The normals on polygonal objects will be frozen.
Normals will not be frozen on a polygonal object that has been negatively scaled.