Question

how a metal is a polycrystalline solids explain it with a meaningfull and can be understandable example​

Answer 1

Answer:

When a polycrystalline metal is plastically deformed the individual grains tend to rotate into a common orientation. This preferred orientation is developed gradually with increasing deformation, and although it becomes extensive above about 90% reduction in area, it is still inferior to that of a good single crystal.