What’s the difference between toughness and strength?
This is somewhat crude from memory. You might want to check an engineering or scientific dictionary. Think of toughness like hardness. Industrial diamonds have a crystal structure. They cut just about everything because they are so hard. I think of strength like in tensile strength. Think of steel - an alloy not unlike glass - cables holding a load off the ground. That's one way to measure strength. Those steel cables will be tested to the load that they fail for strength. Any corrections are always appreciated.
Toughness is the ability to absorb energy. Strength is stress level at which plastic deformation or fracture occurs. Plastic deformation means the material does not return to it’s original shape.