Material or component failure are usually looked at as bad events. However, in certain cases a failure is by design. This talk will look at intentional designed failures of materials or devices, generally as safety measures as opposed to say a bolt, which is designed to fail before the clamping members do, but one doesn’t really want the bolt to failure either. Examples of failure by design are thermally activated materials used for fire sprinkler heads or electrical switches in a furnace. Other examples would be blast doors or blast gates or even chain systems for explosion damage reduction, whether from chemical reactions or combustible dust sources.