This study investigates the elastic properties and tensile strength of 2D Ti3C2Tx MXene monolayers, a class of two-dimensional transition metal carbides and nitrides. Despite theoretical predictions suggesting a Young's modulus of 0.502 TPa, experimental confirmation has been limited due to measurement challenges. The researchers optimized sample preparation, cutting, and transfer protocols to perform in-situ tensile tests on monolayer Ti3C2Tx nanosheets using a nanomechanical push-to-pull (PTP) device under a scanning electron microscope (SEM). The effective Young's modulus was measured to be 0.484 ± 0.013 TPa, closely aligning with the theoretical value. The elastic stiffness was found to be approximately 948 N/m, and the monolayer Ti3C2Tx exhibited an average elastic strain of about 3.2% and a tensile strength of around 15.4 GPa. This work corrects previous reports using nanoindentation methods and demonstrates the potential of Ti3C2Tx for various applications, including flexible electronics and structural membranes. The study also highlights the importance of monolayer measurements in understanding the intrinsic properties of MXenes and their composites.This study investigates the elastic properties and tensile strength of 2D Ti3C2Tx MXene monolayers, a class of two-dimensional transition metal carbides and nitrides. Despite theoretical predictions suggesting a Young's modulus of 0.502 TPa, experimental confirmation has been limited due to measurement challenges. The researchers optimized sample preparation, cutting, and transfer protocols to perform in-situ tensile tests on monolayer Ti3C2Tx nanosheets using a nanomechanical push-to-pull (PTP) device under a scanning electron microscope (SEM). The effective Young's modulus was measured to be 0.484 ± 0.013 TPa, closely aligning with the theoretical value. The elastic stiffness was found to be approximately 948 N/m, and the monolayer Ti3C2Tx exhibited an average elastic strain of about 3.2% and a tensile strength of around 15.4 GPa. This work corrects previous reports using nanoindentation methods and demonstrates the potential of Ti3C2Tx for various applications, including flexible electronics and structural membranes. The study also highlights the importance of monolayer measurements in understanding the intrinsic properties of MXenes and their composites.