Intersections of deformation twins in gamma-TiAl grains were examined in Ti-47at.%Al alloy specimens tensile-tested at 873 K. Transmission electron microscopy (TEM) revealed 1/2 < 1 (1) over bar0]{111} dislocations and 1/6 < 11 (2) over bar]{111} twins in deformed gamma-TiAl grains. Some gamma-TiAl grains contained twins on two different {111} planes, which intersect along < 110] directions (type-1). No twin intersection along < 101] (type-2) was observed, which Was often reported in compressed specimens. Results are discussed with the Schmid factor distributions of twinning systems and slip systems. It should be noted that twinning shear in L1(0) structure is limited only in one 1/6 < 111] movement on a {111}. Considering Schmid factors of possible four twin systems, both type-1 and type-2 twin intersections are expected. Tensile load direction which can activate both twinnings of type-2 intersection can also activate ordinary 1/2 < 1 (1) over bar0]{111} dislocations. The absence of type-2 intersection suggests that ordinary slip systems were favored in these cases. (c) 2004 Elsevier Ltd. All rights reserved.