Ways to avoid Dislocation!

1. Use single crystals and anneal out all the dislocations (expensive - used especially for high performance objects like turbine blades).
2. Work hardening of the metal - this moves all dislocations to grain boundaries (the dislocation essentially becomes part of the grain boundary).
3. Introduce impurity atoms (that is alloying elements) or impurity phases that "pin" the motion of defects. An impurity atom stops the motion because it is a different size, or makes stronger bonds, than the other metal atoms.

There is a fourth away to avoid all this trouble! Could we make completely amorphous metals?

Amorphous Metals

Amorphous metals can only be produced by rapid cooling from the liquid state. Until recently, the cooling rates required were on the order of 105-106 K/s, which limits the thickness of a fully amorphous alloy to fractions of a millimeter. The resulting ribbons and wires are used extensively as
transformer cores and magnetic sensors.