Strength is unrelated to brittleness. Brittleness is a measure of plastic deformation at the (ultimate strength) breaking point. Eg, diamonds, cast iron, and

Strength is unrelated to brittleness. Brittleness is a measure of plastic deformation at the (ultimate strength) breaking point. Eg, diamonds, cast iron, and saltine crackers are all very brittle. Resilience and ductility are related technical terms, but not quite opposites.