At −424°F (−253°C), two new metal alloys refused to crack — they invented new ways to bend

Most metals turn brittle in deep cold, snapping instead of bending — a serious problem for spacecraft, fusion reactors and hydrogen systems that live near absolute zero. An international team led by UC Berkeley and the University of Oxford tested two niobium-titanium alloys at 20 kelvin (−253°C, −424°F) and found no brittle breaking point at all. Instead, at the finest scale, the crystals performed emergency repairs: tiny twins formed and patches of crystal changed structure, spawning fresh defects that let the metal keep flowing around cracks. 'These alloys remain remarkably damage tolerant even at 20 kelvin,' says Oxford's Professor Dong Liu, reporting in Nature — 'a new pathway for designing structural metals' for the coldest places humans build.

SDG 9 · Industry, innovation and infrastructure — Mechanism: tech innovation