Given the mass of Titanium = 3.8 lb
Density of Titanium is 4.506 
We can calculate the volume of Titanium using density and mass.
Converting mass from lb to g:

Calculating the volume of Titanium using density and mass:

Converting volume from
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Calculus, originally called infinitesimal calculus or "the calculus of infinitesimals", is the mathematical study of continuous change, in the same way that geometry is the study of shape and algebra is the study of generalizations of arithmetic operations.
The matter is solid, a liquid or a gas would change shape to match the jar.