adjective, brit·tler, brit·tlest. having hardness and rigidity but little tensile strength; breaking readily with a comparatively smooth fracture, as glass. easily damaged or destroyed; fragile; frail: a brittle marriage.

Is a brittle material a weak material?

Brittle materials do not undergo significant plastic deformation. They thus fail by breaking of the bonds between atoms, which usually requires a tensile stress along the bond.

Is brittle weak?

As adjectives the difference between brittle and weak

is that brittle is inflexible, liable to break or snap easily under stress or pressure while weak is lacking in force (usually strength) or ability.