TeraFERMI is the THz beamline at the FERMI Free-Electron-Laser (FEL) facility. TeraFERMI collects the THz radiation naturally emitted by the electron beam already spent by the FEL undulators, and guide it into a dedicated THz Laboratory. Ultrashort (100's fs) pulses in the 0.3-15 THz range with 1-10 MV/cm electric fields and 0.3-3 Tesla magnetic field will then become available in the FERMI experimental hall. Because of the extremely large fields involved, the beamline can be used to shape material's properties by driving the systems out of equilibrium.