Twin-roll casting (TRC) technique has been proven to be a feasible method for producing metal strips. In this work, a new laboratory-scale twin-roll caster capable of producing long and straight metallic glass composite (MGC) strips was designed and manufactured. The new twin-roll caster generated three types of Ti-based MGC strips (BT30, BT48, and BT60) with varying in situ β-Ti volume fractions at temperatures of 1273 and 1473 K. A series of three-point bending tests were conducted on the Ti-based MGC strips. The results demonstrate that the elements with higher melting temperatures are richer in the middle of the strips rolled at a higher temperature, leading to uneven distributions of composition in the middle and the edge of the strips. The mechanical behavior of MGC strips is greatly influenced by residual stress induced by the thermo-mechanical effect during the TRC process. The large β-Ti crystals with lattice distortion during bending greatly restrict the deformation band, leading to enhanced strength but poor plasticity of the BT48 strip. In comparison, due to the high fraction of crystals with large released crystallization energy, the BT60 strips lead to the severe relaxation of the glassy matrix and cause extreme brittleness. These findings not only provide a new method for preparing MGC strips but also deepen our understanding of the mechanical properties of MGC strips.

双辊铸造（TRC）技术已被证明是生产金属带材的可行方法。在这项工作中，设计和制造了一种新型实验室规模的双辊连铸机，能够生产长而直的金属玻璃复合材料（MGC）带材。新型双辊连铸机生产出三种不同原位的钛基 MGC 带材（BT30、BT48 和 BT60 ）1273和1473 K温度下的β-Ti体积分数。对钛基MGC带材进行了一系列三点弯曲试验。结果表明，在较高温度轧制的带材中部，熔化温度较高的元素较丰富，导致带材中部和边缘成分分布不均匀。MGC带材的机械性能很大程度上受到TRC过程中热机械效应引起的残余应力的影响。弯曲过程中存在晶格畸变的大β-Ti晶体极大地限制了变形带，导致BT48带材强度提高但塑性较差。相比之下，由于释放结晶能大的晶体比例高，BT60 条导致玻璃基体严重松弛并导致极度脆性。这些发现不仅为制备MGC带材提供了一种新方法，而且加深了我们对MGC带材机械性能的理解。