What's the most malleable metal?
Ductility
gold
Ductility can be quantified by the fracture strain 




ε

f




{\displaystyle \varepsilon _{f}}

, which is the engineering strain at which a test specimen fractures during a uniaxial tensile test. Another commonly used measure is the reduction of area at fracture 



q


{\displaystyle q}

.[5] The ductility of steel varies depending on the alloying constituents. Increasing the levels of carbon decreases ductility. Many plastics and amorphous solids, such as Play-Doh, are also malleable.
The most ductile metal is platinum and the most malleable metal is gold.[6][7]