One mole of titanium (6 1023 atoms) has a mass of 48 grams, and its density is 4.54 grams per cubic centimeter, so the center-to-center distance between atoms is 2.60 10-10 m. You have a long thin bar of titanium, 2.8 m long, with a square cross section, 0.11 cm on a side.
You hang the rod vertically and attach a 76 kg mass to the bottom, and you observe that the bar becomes 1.44 cm longer. From these measurements, it is possible to determine the stiffness of one interatomic bond in titanium.