We present the complete analytical result for the two-loop
logarithmically enhanced contributions to the high energy asymptotic
behavior of the vector form factor and the four-fermion cross section
in a spontaneously broken SU(2) gauge model. On the basis of this
result we derive the dominant two-loop electroweak corrections to the
neutral current four-fermion processes at high energies. Previously
neglected effects of the gauge boson mass difference are included
through the next-to-next-to-leading logarithmic approximation.