Tensile failure is the resistance of a material to rupture when subjected to tension. Many fibres offer great flexibility, this characteristic means that they have the ability to support tensile loads. This book provides a concise and authoritative overview of tensile behaviour of textile fibres. Tensile characteristics and tensile failure of both synthetic and natural fibres will be examined. Each type of fibre will be described from manufacture to the finished product with details of tensile properties and discussion on microstructures and tensile failure. Factors that affect tensile properties such as the environment and UV light will be covered, as well as methods to improve tensile failure.