A bending radius can be defined as the minimum radius at which metal can be bent without cracks, deformation, or structural damage. It is one of the important factors in metal fabrication and design to assure material integrity.

Key Features-:

• Purpose: Determines the flexibility and durability of a metal during bending processes.
• Factors Defining Bending Radius: Includes type of material, thickness, and method of bending. 
• Applications: Applied to relevant industries such as construction, automotive, and aerospace manufacturing to develop metal components bent or formed to high tolerances without compromising strength.
• Material Considerations: Softer metals like aluminum typically allow smaller bending radii, while harder metals such as stainless steel require larger radii to avoid fractures.

The bending radius reflects its importance in the regard of mechanical properties that metals exhibit. For example, correct radii with bends make the internal structural elements of aircraft and other flying machines safe and reliable. Good bends in sheet metal fabrication result in durable, accurate elements of structures that waste less material while increasing product life.