We present the Master Integrals needed for the calculation of the
two-loop QCD corrections to the forward-backward asymmetry of a
quark-antiquark pair produced in electron-positron annihilation events.
The abelian diagrams entering in the evaluation of the vector form
factors were calculated in a previous paper. We consider here the
non-abelian diagrams and the diagrams entering in the computation of
the axial form factors, for arbitrary space-like momentum transfer $Q^2$
and finite heavy quark mass $m$. Both the UV and IR divergences are
regularized in the continuous $D$-dimensional scheme. The Master
Integrals are Laurent-expanded around $D=4$ and evaluated by the
differential equation method; the coefficients of the
expansions are expressed as 1-dimensional harmonic polylogarithms of
maximum weight 4.