Millettein

Millettein is a fictional material featured in the science fiction franchise *Star Trek*. It is a dense, highly stable, and extremely durable substance used primarily for constructing starship hulls and other critical structural components. Its primary characteristic is its exceptional resistance to damage, allowing vessels built with milletein to withstand significant impacts, energy weapon fire, and extreme environmental conditions encountered in space.

The material is depicted as being mined from dense nebulae or asteroid fields where specific atmospheric and geological conditions have fostered its formation over vast periods. Its properties are often cited as a key reason for the technological superiority and resilience of starships produced by certain galactic powers within the *Star Trek* universe, such as the United Federation of Planets. While its exact composition is not detailed, it is understood to be a complex crystalline or metallic alloy. Milletein's rarity and the specialized processes required for its extraction and refinement contribute to its high value and strategic importance in the galactic economy and military. Its strength is such that it is often contrasted with less durable materials that are more easily compromised by enemy attacks, making it a desirable and sought-after resource for advanced spacecraft construction.