It is Titanium 351 lighter than the 312 steel?

[Aventura]

I love the PAM 312 and the only doubt that I have is that I read that it is quite heavy, but I found another model that is made of titanium the PAM 351 and is not worth much more than the 312 and is exactly the same except the color of the dial and golden hands. Mi question is: It is Titanium lighter than steel? What I do not like are the models that have the brushed bezel. I prefer bright chrome.
Cheers...