  We study the horofunction boundary of an Artin group of dihedral type with
its word metric coming from either the usual Artin generators or the dual
generators. In both cases, we determine the horoboundary and say which points
are Busemann points, that is the limits of geodesic rays. In the case of the
dual generators, it turns out that all boundary points are Busemann points, but
this is not true for the Artin generators. We also characterise the geodesics
with respect to the dual generators, which allows us to calculate the
associated geodesic growth series.
