Please use the information from the following table to predict the density of Titanium $()($high temperature phase$),$ which has BCC crystal structure. The atomic weight of Titanium is $48\frac{g}{m}$ole.

At lower temperature, Titanium changes from $$ phase to $$ phase. Do you expect to see volume expansion or shrinkage during the phase transition and why? Please assume that the atomic radius does not change with temperature.