Friction ignition is a process where heat generated by rubbing two surfaces together creates enough temperature to ignite a combustible material. This method relies on the frictional force, which converts kinetic energy into thermal energy, leading to combustion without the need for an external flame. Commonly used in survival situations, friction ignition can be achieved with simple tools like a bow drill or hand drill. These techniques require practice and skill to produce a sustainable fire, making them valuable for outdoor enthusiasts and those interested in primitive survival skills.