According to Japan’s Daily Yomiuri, “the history of metal has shifted from copper to steel, and from steel to aluminum. The 21st century looks set to be the age of titanium. ”
Nagu kirjutab Jaapani „Daily Yomiuri ”,„ on metalliajalugu kulgenud vaselt terasele, teraselt alumiiniumile, 21. sajand paistab aga kujunevat titaaniajastuks ”.