  We apply the Tangent Method of Colomo and Sportiello to predict the arctic
curves of the Twenty Vertex model with specific domain wall boundary conditions
on a triangle, in the Disordered phase, leading to a phase diagram with six
types of frozen phases and one liquid one. The result relies on a relation to
the Six Vertex model with domain wall boundary conditions and suitable weights,
as a consequence of integrability. We also perform the exact refined
enumeration of configurations.
