Which material characteristic refers to its resistance to indentations?

• A. Elasticity
• B. Hardness
• C. Ductility
• D. Tensile strength

Answer: (B)

The characteristic that refers to a material's resistance to indentations is hardness. Hardness is a measure of how well a material can withstand deformation under stress, specifically in the form of indentations or scratches. Materials with high hardness are typically able to resist being permanently deformed when a force is applied, making them suitable for applications where durability and wear resistance are critical.

In contrast, elasticity relates to a material's ability to return to its original shape after being deformed, which does not directly address its resistance to indentations. Ductility refers to a material's ability to deform under tensile stress, allowing it to be stretched into wires or other shapes without breaking. Tensile strength measures how much force a material can withstand while being pulled or stretched before failing. While these characteristics describe important aspects of materials, they do not specifically denote resistance to indentation as hardness does.