In 1959, William J. Buehler, a metallurgical engineer at the Naval Ordnance Laboratory in Maryland, was working on a project for the U.S. military to develop a material strong enough for missile warheads. He and his colleague Frederick Wang created an alloy composed almost equally of nickel and titanium, named nitinol, which stands for Nickel-Titanium Naval Ordnance Laboratories. The alloy was initially intended for military applications, such as missile nose cones, which undergo extreme thermal and mechanical stresses during flight. The unique properties of nitinol were not immediately recognized. In 1961, during a laboratory meeting, a supervisor used a lighter to heat a folded sample of the alloy, and it instantly straightened, returning to its original shape. This phenomenon, known as the shape memory effect, was later explained by Frederick Wang through its crystalline structure. The alloy can be deformed at cold temperatures and return to its original shape when heated, a characteristic that was almost unique among known metals at the time. The transition of nitinol from military use to civilian applications occurred gradually. As early as 1976, it was used in dental offices for orthodontic archwires. In 1978, it was used in the hydraulic fittings of the F-14 fighter jets. By the end of the 1980s, nitinol entered the broader medical field due to its shape memory and superelasticity, making it ideal for devices that need to be compressed when inserted into the human body before deploying once in place. Today, nitinol is widely used in medical devices such as stents, which keep narrowed arteries open, guide wires, kidney stone retrieval baskets, vascular filters, surgical needles, and dental files. Its ability to bend without breaking makes it a valuable material in various medical applications. Nitinol's journey from a military material to a key component in modern medicine illustrates how scientific advances can arise from chance and curiosity, far from their original purpose.