It's difficult to definitively say which material has the absolute highest ductility, as ductility can vary depending on factors like temperature, processing, and the specific definition of ductility being used.

However, some materials known for their exceptional ductility include:

* Gold: Gold is renowned for its high ductility and can be stretched into extremely thin wires without breaking.

* Silver: Similar to gold, silver also exhibits excellent ductility, allowing it to be drawn into fine wires.

* Copper: Copper is another highly ductile metal, widely used in electrical wiring due to its conductivity and ductility.

* Platinum: Platinum is a highly ductile metal, often used in jewelry and other applications where malleability and resistance to corrosion are crucial.

* Some polymers: Certain polymers, such as polyethylene and nylon, also possess impressive ductility, allowing them to be stretched and deformed without breaking.

It's important to remember that the "highest" ductility can depend on the specific measurement method and the context of the application.