The strongest naturally occurring metal on Earth is tungsten. It has an extremely high tensile strength, which means it can withstand a significant amount of tensile (pulling) force before breaking. Tungsten is often used in applications where strength and durability are crucial, such as in aerospace and defense industries. However, there are also engineered materials, such as carbon nanotube composites and certain alloys, that can exhibit even greater strength under specific conditions. Keep in mind that the concept of "strongest" can vary depending on the type of force and conditions being considered.