its hardness and strength increases

it is worked below recrystallisation temperature

its hardness and strength increases and it is worked below recrystallisation temperature

none of these

to apply forces

to measure forces

to absorb shocks

to store strain energy

1

2

3

4

F + P

F - P

P

F

10 to 20%

20 to 30%

30 to 40%

40 to 50%