I just read about these guys last week:
https://www.vaastbikes.com/company/LIGHTER, STRONGER, PROFOUNDLY BETTER—SUPER MAGNESIUM.
VAAST Bikes® are the first to use ALLITE® SUPER MAGNESIUM™. This high-strength alloy features excellent shock absorption properties, weighs 33% less than Aluminum and 50% less than Titanium by volume, and is significantly stronger than both. Through the exclusive use of this eco-friendly metal, we have achieved a ride feel like no other.