Element used to toughen steel
Else clues• Element #22
• Element in steel
• Golf club metal
• Hard metal
• Hard, silvery-gray metal
• Steel component
• Steel ingredient
• Steel toughener
• Tough metal
• A light strong gray lustrous corrosion-resistant metallic element used in strong light-weight alloys (as for airplane parts)
• The main sources are rutile and ilmenite