titanium

noun

a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts)
強い軽量合金に使用される、軽くて強い灰色の光沢がある耐食性金属元素（飛行機の部品のような）

the main sources are rutile and ilmenite
主な原鉱は金紅石およびチタン鉄鉱

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