Rank a set of materials by density and strength/weight ratio

Aerospace Engineering
1

Ranking the following materials by density and strength to weight ratio:

Steel, Aluminum, Titanium, Carbon Fiber

Density (g/cm3):

  1. Steel - 7.8
  2. Titanium - 4.5
  3. Aluminum - 2.7
  4. Carbon Fiber - 1.3

Strength to weight ratio (MPa/(g/cm3)):

  1. Carbon Fiber - 185
  2. Titanium - 49
  3. Aluminum - 44
  4. Steel - 29