is rubber ductile or brittle?

This implies that the wire is both elastic as well as ductile. Rubbers are elastic materials. The elasticity is due to Tg of rubber is below the room temperature.Rubbers can be made brittle by cooling them less than their Tg
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  • it is both ductile and brittle depending upon temperature
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Brittle
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RUBBER IS DUCTILE DUE TO ITS SPECIAL PROPERTY OF ELASTICITY. AND ACCORDING TO YOUNG'S MODULUS, THE ELASTIC PROPERTY OF RUBBER IS HIGH.. BUT AFTER REACHING THE FRACTURE POINT THE ELASTIC LIMIT OF RUBBER ENDS. SO MY ANSWER IS, RUBBER IS BOTH DUCTILE AND BRITTLE DEPENDING ON THE PHYSICAL FACTORS EX. TEMP. PRESSURE... 
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What is this Tg @Vishesh Rao.
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