Anomalous antiphase domain growth was observed in Ti3Al after prolonged annealing, and its mechanism was investigated by detailed transmission electron microscopy observation. Significant numbers of dislocations were observed around anomalously coarsened antiphase domains, and antiphase domain boundaries were terminated with dislocations having non-c-axis components of Burgers vectors (b) parallel to the phase-shift vector R of the antiphase domain boundaries. This implied that the anomalous antiphase domain coarsening occurred via antiphase domain boundary elimination by motion of superpartial dislocations whose b values  could cancel the R of antiphase domain boundaries.

Anomalous Growth of Antiphase Domains in Ti3Al. Y.Koizumi, T.Fujita, Y.Minamino: Scripta Materialia, 2009, 60[3], 144-7