The Forging Process:
Each J W Bensinger custom knife begins as a bar of the appropriate alloy, which is then forged to the desired shape-allowing better and more economical use of the material, and more variety in shape and balance than can easily be accomplished otherwise. 
The blade is then ground to shape, normalized to remove any stresses from forging or grinding, and differential hardened in oil three times. This gives a fully hardened edge and a tough body to the blade. The blade is then given two tempering soaks, tested, polished, and mounted in a hilt.
Blades in the plain carbon steels (1095, 1084 and such) are differential quenched and tempered twice, without the triple quench (since they lack the alloying elements which benefit from the process.)