Rail train, bogie and framework

The invention discloses a rail train, a bogie and a framework. The framework comprises side beams and cross beams. The side beam comprises a first side beam end part, a side beam middle part and a second side beam end part, and the first side beam end part, the side beam middle part, the second side beam end part and the cross beam are all titanium alloy integral casting structural parts. The first side beam end portion, the side beam middle portion, the second side beam end portion and the cross beam are all arranged to be titanium alloy integrally-cast structural parts, and the weight of each structural part can be reduced. 本发明公开了一种轨道列车、转向架和构架，构架包括：侧梁和横梁；所述侧梁包括第一侧梁端部、侧梁中部和第二侧梁端部，其中，所述第一侧梁端部、所述侧梁中部、所述第二侧梁端部和所述横梁均为钛合金整体铸造结构件。将第一侧梁端部、侧梁中部和第二侧梁端部以及横梁均设置为钛合金整体铸造结构件，可降低各结构件的重量。