Resumen: This study explores the construction of teachers' identities during their pre-service training and their initial period of professional induction. Thirteen life stories of novice teachers of differing characteristics attending the Master's Degree in Secondary Education Teaching at the University of Barcelona (Spain) are analysed. Findings identify four dimensions in identity construction (attribution, projection, development and transformation) and analyze their key components. The implications of the findings are discussed in terms of the dialectic between the professionalizing models in the training programme and the professional communities and teachers' specific personal processes of professional self-determination. Idioma: Inglés DOI: 10.1016/j.tate.2024.104697 Año: 2024 Publicado en: TEACHING AND TEACHER EDUCATION 148 (2024), 104697 [16 pp.] ISSN: 0742-051X Tipo y forma: Artículo (Versión definitiva) Área (Departamento): Área Métod.Invest.Diag.Educac. (Dpto. Ciencias de la Educación)