• The hot deformation behavior of 2707 HDSS was characterized by a balance between work hardening and dynamic recovery at low strains, followed by distinct softening mechanisms depending on strain rate.
• Dynamic recovery dominates at high strain rates, while dynamic recrystallization becomes prevalent at medium and low strain rates, with ferrite completing dynamic recrystallization at 1 s-1.
• The deformation activation energy was determined as 645.46 kJ·mol-1, and the hot processing map at strain 0.8 indicates reduced hot workability due to high alloying content.
• Microstructural analysis reveals that austenite softening is influenced by ferrite, primarily undergoing dynamic recovery, but austenite at α/γ phase boundaries tends to dynamically recrystallize.