Intermediate temperature embrittlement (ITE) behavior in superalloy 718 has been investigated by tensile testing with different strain rates at different temperatures. The deformation microstructures and fracture were analyzed using SEM EBSD/ECCI techniques. The results show that the ITE behavior in superalloy 718 can be minimized and eventually avoided with high strain rates at 750°C. The elongation can even become higher than that at room temperature. This is the first observation. Oxidation and strain dynamic strain ageing are classical mechanisms for ITE. Increase in strain rate can minimize these two effects and consequently ITE. However, EBSD/ECCI analysis shows that increase in strain rate can decrease strain or stress localization and increase more homogeneous plastic deformation in the matrix. This can reduce intergranular cracking. Another new phenomenon is the formation of deformation twinning. This can lead to a twinning induced plasticity or elongation. The present study increases the fundamental knowledge on ITE.