Are the magnetic elements of meteorites that have struck Earth aligned with the magnetic field?
The surface of 'iron' meteorites certainly gets hot enough to exceed the curie temperature, hence the characteristic ablation texture that you see on meteorites in museums. However, that's a surface feature, and wouldn't affect the interior of all but the smallest of meteorites. The tumbling passage through the atmosphere for just a few seconds, coupled with the shock of impact when it landed is such that there wouldn't be any clear magnetic signature of anything within the outer skin of the meteorite. 

In large meteorites, consisting of solid Ni-Fe, the residual magnetism seems to reflect the magnetic field of that part of the solar system from whence they came. Other meteorites contain fragmentary components of varying magnetic orientation, also, (presumably) related to magnetic fields within the early history of the solar system.