there is provided cryogenic milled copper alloys and methods of making the alloys . the alloys are fine grained and possess desirable physical properties stemming from the fine grain size . embodiments include desirable physical properties , such as potentially high strength . some embodiments of the cryogenic milled copper alloys may also be tailored for ductility , toughness , fracture resistance , corrosion resistance , fatigue resistance and other physical properties by balancing the alloy composition . in addition , embodiments of the alloys generally do not require extensive or expensive post - cryogenic milling processing .