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This paper presents the results of a protocol study exploring the impact of various digital technologies on team collaborative design processes. Previous studies have suggested that compared to traditional methods such as sketching, digital technologies can provide further benefits for collaborative processes. However, there persists a lack of understanding about the impacts of digital technologies on such processes, particularly in relation to emerging significant digital technologies such as immersive Virtual Reality (VR). Therefore, this study aims to fill that gap by exploring team collaboration behaviours of two groups of professionals working in two digital design environments—desktop 3D modelling with Revit and immersive VR using Hyve-3D—as well as their behaviours during traditional sketching sessions for benchmarking purposes. Utilising protocol analysis method, the think-aloud data of participants was recorded, transcribed and coded using an adapted collaborative practice model. Team collaboration activities are broadly categorised as 'Content' or 'Process': content referring to design task-based activities, while process refers to activities related to the organising of group processes. The results suggest that during the design collaboration process, designers allocated the majority of their efforts towards process-oriented design activities. Differences between design environments only had a minor impact on the amount of effort expended on process-oriented activities and content-oriented activities. Moreover, traditional sketching design environments were shown to be potentially beneficial for problem-solution and associated negotiation activities. Additionally, immersive environments were associated with a reduction in the designers' cognitive effort that was expended on exploring the design environment. [ABSTRACT FROM AUTHOR]