  A prior report of the emergence of chirality for the (2x2x2) charge density
wave (CDW) in TiSe2 has attracted much interest; the drastic symmetry breaking
is highly unusual with few precedents [1]. In that study, key evidence was
provided by x-ray diffraction measurements of two superlattice reflections,
(1.5 1.5 0.5) and (2.5 1 0). The (2.5 1 0) reflection appeared to show an
anomalously large intensity and a transition onset at ~7 K below that of the
(1.5 1.5 0.5) reflection. These observations, aided by modeling, were cited as
evidence for a separate chiral transition. In this Comment, we show that the
prior conclusions based on x-ray diffraction are erroneous. There is just one
transition, and it is achiral.
