Questions for forming the tip

Hey so uh. I'm someone who is learning how to make blades while using as little modern tools as possible. (Meaning little to no machines during the whole process.) From of 1/2" by 2" steel blocks.

I'm at the point where I can form the blade and it looks good... Until I'm trying to make the tip and it REFUSES to fuse together and makes a split no matter what I try to do. For the past 8 blades I've made it's turned out like this, and I always break apart and keep the broken pieces every time it happens.

My question is. Does anyone know how to make the tip behave? This is honestly frustrating me.