Polyduranide

Polyduranide was a metallic material used for construction purposes during the 24th century. It was tough to replicate. 

In 2368, after the USS Enterprise (NCC-1701-D) had been hit by a quantum filament, an energy conduit ruptured and ignited the polyduranide inside a cargo bay bulkhead, causing a plasma fire. 

Baseball bats in the 2370s could be made of polyduranide. Kasidy Yates' brother's team, the Pike City Pioneers, played in a league that had decided to use wooden baseball bats instead. 

On a larger scale, the hulls of Trabe starships, later Kazon fighters, were composed of a polyduranide alloy, an alloy not used in the construction of Federation spacecraft. 

In 2374, Harry Kim asked Tom Paris to replicate some polyduranide golf clubs for him, for his rematch with Ensign. 

Polyduranid