Which lightweight structural materials are known for high strength-to-weight ratio and scalable production?

Some lightweight structural materials known for a strong strength-to-weight ratio and scalable production include:

• Aluminum alloys — widely used, easy to manufacture at scale, good corrosion resistance, and excellent specific strength.
• Titanium alloys — very high strength-to-weight ratio, though more expensive and harder to process than aluminum.
• High-strength steels — not as light as aluminum or titanium, but very strong and widely scalable in production.
• Magnesium alloys — among the lightest structural metals, with good specific strength but more limited corrosion resistance and processing challenges.
• Fiber-reinforced polymers (FRPs), especially:
  • Glass fiber composites (GFRP) — relatively low cost, scalable, and lightweight.
  • Carbon fiber composites (CFRP) — very high strength-to-weight ratio, but typically more expensive.
• Advanced thermoplastic composites — increasingly attractive for mass production because they can be processed faster than traditional thermoset composites.

If you want, I can also rank these by cost, manufacturability, or aerospace vs automotive suitability.