The isothermal annealing behavior of some amorphous ferromagnetic alloy ribbons has been determined. The quantities measured were the macroscopic stress at constant strain, the strain at fracture in bending, and the anisotropy, defined as the energy required to reach magnetic saturation. The annealing temperatures were in the range 150 to 300°C, which is too low to cause measurable crystallization in the alloys studied. The changes in stress, fracture strain, and anisotropy with time were qualitatively similar, suggesting that the same atomic rearrangements are responsible for all three.