Which statement about aluminum is true?

• A. Aluminum is always hard and brittle.
• B. Aluminum can be soft and flexible or hard and brittle.
• C. Aluminum cannot be bent.
• D. Aluminum weighs more than steel.

Answer: (B)

Aluminum’s behavior isn’t fixed; its properties change with alloy composition and temper. Pure aluminum is soft and ductile, easy to bend and form. By adding alloying elements and applying heat treatment or work hardening, aluminum can become much harder, and in some high-strength conditions may feel brittle. This range—soft and flexible to hard and potentially brittle—fits how aluminum behaves across its various alloys and tempers, so that statement is the true one. It can be bent or formed, so it’s not always hard and brittle or unbendable, and it weighs less than steel, not more.