Titanium is lightweight

https://flipboard.com/@aidenvitali/in-the-energy-sector-titanium-based-alloys-are-used-in-power-plants-and-oil-and-7bc7k5bsz/-/a-5dqblFAhQVCsw9NUnQr0iA%3Aa%3A4101546342-%2F0

Titanium is a lightweight metal with a high strength-to weight ratio. It's a popular material for sporting equipment such as golf clubs and bike frames