In response to yet another frame materials question, I thought it might be useful to start with a more answerable question. One answer per material please, with an example of a bicycle frame using that material.

Please use the format I've used in my answer(s) to make it easy to compare materials.

I see no harm in having all 400+ steel alloys listed if someone wants to do that, but "steel" must specifically be low-grade mild steel rather than a specific alloy. Likewise for aluminium, titanium, magnesium and other metals.

For composites, including metal composites, I would again prefer specific examples with details (there's a big difference between steel reinforced concrete and kevlar/polyester composites). I would also love to see weird and wonderful bikes included.

Materials

(ie index to answers. Please update links as you add an answer):

Metals

• Aluminum Bikes
  • Aluminum
  • Scandium - Aluminium alloy
• Steel Bikes
  • Columbus Steel (not written yet)
  • ChromeMoly Steel (not written yet)
  • Gaspipe Steel
  • Ishiwata Steel (not written yet)
  • Kaisei Steel (not written yet)
  • Mild Steel
  • Reynolds Steel (needs extension)
  • Tange Steel (not written yet)
  • Vitus/Super Vitus Steel (not written yet)
• Titanium
• Beryllium
• Gold (pure) (theoretical)
• Magnesium (not written yet)

Organic

• Bamboo
• Bones
• Wood Bikes
  • Carved Wood
  • Plywood (composite)
  • Wood (complete frame and bicycle)
• Cardboard (not yet written)

Composites and Polymers

• Carbon Fibre
• Flax fiber (90% flax, 10% carbon)
• Plastic
• Ceramic/Aluminium

Layout Specific

• Cables aka Tensegrity or Tensional Integrity
• 3D Printed (not yet written)