Building a swing on the terrace - dimensions

[herregud]

I'm planning to build a swing on the patio, almost like the picture below except I'll only have one crossbeam in the middle (at the top) for the swings.

I initially considered using laminated wood 95x95 but then realized it might not be optimal for outdoors. Do you think a 95x95 regular treated beam could work?

I was thinking that all the material should be 95x95 in the construction.

Width 2.5m, i.e., the span.

Thanks for the answer