Assuming a 1 gram piece of cheese. At the speed of light, the kinetic energy, in joules, of the cheese would be it's velocity squared over two. Let us also assume the 1 gram of cheese is traveling at the speed of light (299792458 m/s). That would mean that this piece of cheese has about 44,937 TJ (terajoules) of energy on impact. For comparison, Little Boy released about 63 terajoules on Hiroshima. For every gram of cheese we add, this figure doubles.... it's not hard to imagine a piece of cheese capable of disintegrating 8 miles of titanium... discounting the question of what the actual mass of the titanium is.