Relativistic heavy ion collisions can generate metastable domains in w
hich the chiral condensate is disoriented. Nucleus-sized domains can y
ield measurable fluctuations in the number of neutral and charged pion
s. We propose a scenario in which domains are ''annealed'' by a dynami
cally evolving effective potential in the heavy ion system. Domains of
sizes exceeding 3 fm are possible in this scenario.