Which preposition to use with malleable

in Occurrences 3%

As for the golden age of maturity itself, what humdrum people and poets have despised as middle age, the margin of reserve of the ruling hormone is a quantity almost malleable in our hands, but still to be regarded with respect as a hard cold proposition by the physiologist.

as Occurrences 1%

The specific gravity is but two and one-half times that of water; it is lighter than glass or as light as chalk, being only one-third the weight of iron and one-fourth the weight of silver; it is as malleable as gold, tenacious as iron, and harder than steel, being next the diamond.

at Occurrences 1%

In fact, the Negro character is malleable at the European will.

of Occurrences 1%

They are the most malleable of human metal, the finest material for the sculptor of humanity, the most impressionable of wax.

Which preposition to use with  malleable