Cryogenic machining is becoming a sustainable choice due to its extraordinary performance (such as non-toxic and environmentally friendly) superiority to other traditional coolants and lubricants to produce products with superior quality. This paper also critically reviews improvements in designing the cryogenic delivery setup used by researchers for machining low machinability materials like titanium alloys, nickel alloys, ferrous alloys, composites, and other difficult-to-cut materials. It also briefs the economic and sustainable perspective of this state-of-art technology. The aim is to maximize the usage of sustainable cryogenic and hybrid machining technologies in the global manufacturing industry by highlighting their advantages. An overview of in-house developed cryogenic and hybrid machining techniques is presented. Various challenges and future needs related to cryogenic and hybrid-machining techniques are also discussed in the articles. Although remarkable results are obtained with the available literature's delivery methods, there is still no consensus regarding the best cryogenic delivery methods for machining the aforementioned materials. In addition, further hybridization of cryogenic delivery techniques with near dry machining techniques such as minimum quantity lubrication (MQL), electrostatic-MQL (EMQL), and nanofluid based MQL (nMQL) can be beneficial for machinability improvements of difficult-to-machine materials.

低温加工因其非凡的性能（如无毒和环保）优于其他传统冷却剂和润滑剂，可生产出质量上乘的产品，因此正成为一种可持续的选择。本文还批判性地回顾了研究人员在加工钛合金、镍合金、铁合金、复合材料和其他难切削材料等低机械加工材料时使用的低温输送装置设计方面的改进。它还简要介绍了这种最先进技术的经济和可持续发展前景。其目的是通过突出可持续低温和混合加工技术的优势，在全球制造业中最大限度地利用它们。介绍了内部开发的低温和混合加工技术的概述。文章中还讨论了与低温和混合加工技术相关的各种挑战和未来需求。尽管使用现有文献的传递方法获得了显着的结果，但对于加工上述材料的最佳低温传递方法仍然没有达成共识。此外，将低温输送技术与微量润滑 (MQL)、静电-MQL (EMQL) 和基于纳米流体的 MQL (nMQL) 等近干式加工技术进一步混合，有助于提高难加工材料的可加工性. 对于加工上述材料的最佳低温输送方法仍然没有达成共识。此外，将低温输送技术与微量润滑 (MQL)、静电 MQL (EMQL) 和基于纳米流体的 MQL (nMQL) 等近干式加工技术进一步混合，有助于提高难加工材料的可加工性. 对于加工上述材料的最佳低温输送方法仍然没有达成共识。此外，将低温输送技术与微量润滑 (MQL)、静电-MQL (EMQL) 和基于纳米流体的 MQL (nMQL) 等近干式加工技术进一步混合，有助于提高难加工材料的可加工性.