Does Brittleness Increases with Hardness?

Hardness is a material's resistance to surface deformation. Harder surfaces are subjected to greater internal stresses, and have a tendency to increase in brittleness, often relying on unhardened internal material for their structural strength.

What is the relationship between brittleness and hardness?

Hardness is the ability to resist deformation. Brittleness is the tendency to undergo sudden catastrophic structural failure instead of plastic deformation.

Is brittleness is directly proportional to hardness?

Since the hardness increases with the increase in strength and increase in hardness led to increase in brittleness. As we see in many cases the strength and elongation increases with reinforcement.