My partner and I are designing a more resistant and useful umbrella. We had done a lot of researches about normal umbrellas

and we found that a normal umbrella has about 24 fragile points. We are trying to reduce the number of fragile points. On solidworks

we created our model. Our model just includes 8 bending points. We want to close the arms of the umbrella with force to the bending point

to the pole. Furthermore, we put a magnet on the pole that will hold the arms when it is closed. My question to you is, any idea what type of

metal can I used for this mechanism?

Thank you

Shlomi Hadar