  The analytical two-chain Frenkel-Kontorova model is used to describe domain
wall networks in bilayer graphene upon biaxial stretching of one of the layers.
We show that the commensurate-incommensurate phase transition leading to
formation of a regular triangular domain wall network at the relative biaxial
elongation of $3.0\cdot 10^{-3}$ is followed by the transition to another
incommensurate phase with a striped network at the elongation of $3.7\cdot
10^{-3}$. The reentrant transition to the phase with a triangular domain wall
network is predicted for the elongation $\sim10^{-2}$.
