Titanium Strength at 1/10th the Cost

South Korean metal researchers have come up with a steel-aluminum-nickel alloy that is as strong as titanium yet more ductile (bendable).  This could save weight and add durability to bridges and automobiles.  Ultimately it could provide an important new material to aeronautuical engineers and designers.

Source: Sang-Heon Kim, Hansoo Kim, and Nack J. Kim. "Brittle intermetallic compound makes ultrastrong low-density steel with large ductility." 5 FEBRUARY 2015 | VOL 518 | NATURE | 77

Summarized at:

http://www.realclearscience.com/journal_club/2015/02/04/new_steel_outperforms_titanium_109058.html

see also

 
http://www.economist.com/news/science-and-technology/21642107-alloy-iron-and-aluminium-good-titanium-tenth