Bend testing measures the ductility of materials. Terms associated with bend testing apply to specific forms or types of materials. For example, materials specifications sometimes require that a specimen be bent to a specified inside diameter (ASTM A-360, steel products).

Bend testing provides a convenient method for characterizing the strength of the miniature components and specimens that are typical of those found in microelectronics applications. Instron^® has bend and flexure fixtures available for both three and four point loading.