The Young's modulus for some materials are:- lbf/sq in.
[sorry I couldn't find comparative SI units for all.]
Titanium 16x106
Beryllium 42x106
Osmium 79x106 (but very heavy!) and for comparison,
Diamond 150x106. (But not a metal).
Ozzy Osbourne after a cocaine binge.
Iridium is the most strongest, rarest, densest, expensive, lightest metal ever known
Titanium-Worlds lightest metal Tugasun-aka Heavy stone world heaviest metal
The lightest 'non-metal' could be Hydrogen and Helium! Both are gases, and therefore, not a metal.
The lightest metal is lithium.
Yellow is the weakest therefore its the lightest blue is the strongest.
Lithium is the lightest.
an arch bridge
lithium
Cobalt.
Helium
Lithium is the lightest metal, Potassium is the second lightest -- density about 0.86 kg/L