The following submission statement was provided by /u/tonymmorley:

"An alloy made of almost equal amounts of chromium, cobalt and nickel resists fracturing even at incredibly cold temperatures, which could make it useful for building spacecraft" — Toughest material ever is an alloy of chromium, cobalt and nickel 🧊

Now, presuming you don't have mad bank to flex on a New Scientist subscription, and seeing as how I can't jump the paywall effectively, here's another alternative source.

This Alloy Is The Toughest Known Material on Earth, And It Gets Tougher in The Cold

> "An alloy of chromium, cobalt, and nickel has just given us the highest fracture toughness ever measured in a material on Earth.
It has exceptionally high strength and ductility, leading to what a team of scientists has called "outstanding damage tolerance".
Moreover – and counterintuitively – these properties increase as the material gets colder, suggesting some interesting potential for applications in extreme cryogenic environments."

Please reply to OP's comment here: https://old.reddit.com/r/Futurology/comments/zna8el/toughest_material_ever_is_an_alloy_of_chromium/j0fsikh/