Physical hydrogelation in biopolymer (gelatin, collagen, etc.) solutions, induced upon cooling biopolymer solutions below their gelation temperatures , has emerged as an avenue to enhance printability while retaining ECM-mimicking microstructures, biocompatibility, and biodegradability. Functionalization of biopolymers (e.g., methacrylation , norbornene or thiol modification ) to enable secondary crosslinking has further improved ink printability and enhanced shape fidelity by "locking" the printed microstructures. However, these strategies suffer from reduced cell survival in the cooled cartridges , require secondary crosslinking soon after deposition of a layer and yield poor inter-layer bonding. Moreover, printing tall structures results in loss of shape fidelity owing to worsening heat transfer from the cold substrates . Alternatively, crosslinking biopolymers with multivalent ions , or incorporating additives such as nanocellulose and nanoclay have been employed to enhance the viscosity of precursor solutions. However, such additives show long-term nanotoxicity and limited biodegradability , and do not confer any advantageous properties to the hydrogel inks after secondary crosslinking. Thus, although substantial efforts have been put over the last decade into the design of increasingly sophisticated and multicomponent hydrogel systems , there is still a lack of extrudable and highly tunable bioinks that perform optimally at physiological temperatures, which is highly desirable in tissue engineering.