Answer is:
different crystal structures at different temperatures
Explanation:
allotropy is the existence of two or more crystalline or molecular structural forms of an element that have different chemical or physical attributes.
Answer is:
is more ductile and has a less tendency to distort during heat treatment
Answer is:
is less tough and has a greater tendency to distort during heat treatment
Explanation:
A coarse grained steel is less tough and has a greater tendency to distort during heat treatment