This study reports on the non-discursive aspects of the disciplinary enculturation experiences of five international doctoral students from East Asia in three Second Language studies graduate programmes in the United States. Based largely on interview data, this study examined how students participate in their graduate discourse communities and what may contribute to or hinder academic success. It appeared that the kinds of "social capital" accrued through social ties and networks are key to students' successful disciplinary enculturation, suggesting the importance of establishing positive personal interactions and locating oneself within supportive discourse community contexts. The present study also sheds light on the issue that disciplinary enculturation is an inherent cultural practice, which may not favour students who do not adopt mainstream socio-academic conventions. (Contains 1 note and 1 table.)