  White dwarf-white dwarf (WD-WD) mergers may lead to type Ia supernovae
events. Thompson (2011) suggested that many such binaries are produced in
hierarchical triple systems. The tertiary induces eccentricity oscillations in
the inner binary via the Kozai-Lidov mechanism, driving the binary to high
eccentricities, and significantly reducing the gravitational wave merger
timescale (T_GW) over a broad range of parameter space. Here, we investigate
the role of tidal forces in these systems. We show that tidal effects are
important in the regime of moderately high initial relative inclination between
the inner binary and the outer tertiary. For 85 < i_0 < 90 degrees (prograde)
and 97 < i_0 < 102 degrees (retrograde), tides combine with GW radiation to
dramatically decrease T_GW. In the regime of high inclinations between 91 < i_0
< 96 degrees, the inner binary likely suffers a direct collision, as in the
work of Katz & Dong (2012) and tidal effects do not play an important role.
