A arbitragem é um mecanismo consensual de resolução de disputas com vistas à prolação de uma sentença passível de execução. Na arbitragem comercial, a convenção arbitral é considerada a pedra angular do instituto, motivo pelo qual é nela que o presente estudo estará centrado. Sendo a convenção arbitral um negócio jurídico e, considerando que, para a formação de qualquer negócio jurídico requer-se a presença do consenso, segundo o qual o acordo de vontades é suficiente à conclusão da avença, o consentimento mostra-se como um elemento essencial da convenção arbitral, tendo em vista que ela não existe sem acordo de vontades. Nesse sentido, faz-se necessário examinar como o consensualismo se aplica e se manifesta na arbitragem comercial. Para esse fim, devem ser desenvolvidas as questões atinentes à aplicação do consensualismo à validade formal e material da convenção arbitral. Em relação às exigências formais para a validade da convenção arbitral, ver-se-á que mesmo que essas tenham sido relativizadas, sobretudo em relação à arbitragem comercial internacional, muitas questões ainda surgem quanto à necessidade de respeito aos requisitos formais para que uma parte possa ser considerada validamente obrigada pela convenção arbitral, seja no direito brasileiro, seja em outros ordenamentos jurídicos. Em relação à validade substancial da convenção arbitral, serão examinadas outras formas de manifestação do consentimento das partes, tendo em vista que a manifestação de vontade das partes nem sempre se dá pela expressa assinatura na convenção arbitral escrita, podendo os comportamentos adotados pelas partes, do início ao término do contrato, e mesmo durante o procedimento arbitral, ser uma forma de apontar para a sua intenção em relação à arbitragem. Ao final, será feita uma reflexão crítica no sentido de verificar qual a importância que o consentimento tem na prática arbitral atual e se o seu conceito se alterou, para que nele também tenham lugar as novas práticas adotadas pelos agentes do comércio internacional. / Arbitration is a consensual and private dispute resolution mechanism which leads to an enforceable arbitral award. In commercial arbitration the agreement to arbitrate is considered to be the cornerstone of arbitration, and that is why this study will be centered in it. Being the arbitration agreement a contract and considering that for the formation of any valid contract the presence of consent is required, whereby the mutual will of the parties is enough to the conclusion of the contract, the consent shows itself as an essential element of the agreement to arbitrate, since it doesn\'t exist without the mutual will of the parties. In this sense, it is necessary to examine how consent applies and manifests itself in commercial arbitration. To that end, the issues concerning the application of consent in the formal and material validity of the agreement to arbitrate must be developed. With regard to the formal requirements for the validity of the arbitration convention, it will be seen that even if they have been relativized, especially in relation to international commercial arbitration, many questions still arise about the need to respect the formal requirements in order to a party may be considered validly bound by the arbitration agreement, this is so in Brazilian law and in many other jurisdictions. Regarding the substantial validity of the agreement to arbitrate, this study will examine other forms of manifestation of consent, considering that the expression of the will of the parties is not always proven by their express signature in the written arbitration agreement, and the behaviors adopted by the parties, from the beginning to the termination of the contract, and even during the arbitral proceedings, may be a way of pointing to their real intentions in relation to arbitration. In the end, it will be made a critical reflection in order to verify what is the importance of consent in current arbitration practice and if its concept has changed, in order to embrace the new practices adopted by the players of international trade.

This thesis discusses the limits of statute of contractual obligations solely from the perspective of conflict of law rules. It is based primarily on the analysis of national conflict of law rules contained in Act No. 91/2012 Coll., On Private International Law. There are also analyzed relevant standards of the European Parliament and Council Regulation (EC) No. 593/2008 on the law applicable to contractual obligations (Rome I) and conflict of law rules in the German Initial Act to the Civil Code, as well as in the Swiss Act on Private International Law. The primary hypothesis of this work is the concept of a single contractual statute, which governes contractual relationship since the early beginning to the end. The secondary hypothesis follows the departure of German international private law from the principle of seat for the principle of incorporation. Another hypothesis explores the safeguarding of property rights once acquired, if the substantive legal facts are in the mode of the original substantive statute closed that no means no and yes means yes, but ... This work also examines the question of whether the European legislator through the unification of rules of conflict of law removed the deficiencies that resulted from the application of autonomous national conflict of law rules or...