From the factory:
Hammer Tested: They test a sample of every batch coming out of heat treat by pulling across a bow while hitting with a hammer. This insures they are not brittle.
Frozen Forged: At heat treat once they come out of the furnace, they 1) get an oil quench, then 2) a preliminary temper, then 3) are cryogenically treated to improve temper, then 4) heat tempered again to finalize process.
Hopefully I didn't mess up what he said too bad.
Mike Latham
CollectorKnives.Net