The book tells about the most common mechanical properties and the most extraordinary "super-properties" of metals and alloys: superelasticity, superplasticity, super strength. The reader learns about why one metal can make a good spring, and the other generally behaves like rubber; why one alloy makes a magnificent bell ringing, and the other makes it like a fish; why the same alloy can be strong and resilient, and can flow like liquid glass. The book also devotes a significant place to the recently discovered property of metals to memorize the shape and use of memory alloys in space and in terrestrial conditions. For schoolchildren, teachers, students.